Professor Chris Grovenor, FIMMM, FIP
Department of Materials
Tel: +44 1865 273777 (reception)
Fax: +44 1865 273789 (general fax)
Fellow of St Anne's College,
Tutor in Materials
Tel: +44 1865 274873
Centre for Applied Superconductivity
Chris Grovenor has interests in the application of advanced analytical techniques to understanding the relationship between chemistry and microstructure and the properties of functional materials. Current areas of research include:
Oxidation and hyriding mechanisms of Zr nuclear cladding alloys (with Rolls Royce, Westinghouse, EPRI, EDF, CNL, Manchester University and Imperial College)
Synthesis and characterisation of the new superconducting materials (with Dr Susannah Speller). I am also the Director of the new £6.5M Centre for Applied Superconductivity funded by the Oxfordshire LEP and working with local companies and research organisations, and with the Clarendon Laboratory.
Leadership of the group developing high resolution SIMS analysis using our CAMECA NANOSIMS 50. This includes studies hydrorgen (deuterium) pickup mechanisms in zirconium alloys and boron distributions in her temperature Ni alloys (in collaboration with Prof. Roger Reed) and steels (in collaboration with Tata Steel).
The development of new superconducting/dielectric composite metamaterials under the QUEST programme grant (with Prof. Patrick Grant and QMUL and Exeter Universities).
Nitride superconducting thin films for quantum device applications
Researchers Harry Orchard, Prof. S.C. Speller, Professor C R M Grovenor
Many of the most exciting advances in quantum technologies rely on very high quality resonant circuits fabricated in superconducting materials. Simple Al or Nb films can be used, but many of the most impressive results have been achieved with nitride films as the superconducting material because they offer greater stability to atmospheric attack and oxidation and so are less lossy. Previous work on TiN films has shown that the stoichiometry uniformity, oxygen content, resistivity, texture and residual strain all have a significant impact on resonance performance, and that film uniformity over large areas will be an important issue in future more complex circuit designs. The objective of this project is to explore a wider range of new superconducting compounds and alloys, (Nb,Mo,Ti)N for example, for low loss resonant structures. Working closely with our industrial partners Oxford Instruments, we will use the new thin film growth and characterisation facilities in the Centre for Applied Superconductivity (www.cfas.ox.ac.uk) to deposit and measure the properties of nitride thin films, and to assist in the testing of resonator performance with the quantum technology groups in both Physics and Materials Departments.
Superconducting joints in technological materials
T Davies, Prof. S.C. Speller, Prof. C.R.M. Grovenor, Dr M'hamed Lakrimi*
This project aims to explore strategies for producing superconducting joints between a variety of different technologically-important superconducting wires, focussing on using novel high resolution imaging techniques to characterise the local microstructure, chemistry and superconducting properties. The project aims include developing lead-free materials for presistent mode joints in MRI magnets. Strategies for jointing HTS materials with conventional low-temperature superconductors, such as NbTi and Nb3Sn, will also be investigated. (*Siemens Magnet Technology). Projects supported by Industrial Case Studentship from SMT.
The Quest for Ultimate Electromagnetics using Spatial Transformations (QUEST)
Dr D. Isakov, Dr F. Castles, Prof. C R M Grovenor, Prof. P S Grant
Recent UK-led breakthroughs in the theory of STs, such as the possibilities concerning cloaking and invisibility, have caught both the scientific and popular imagination, and have stimulated a huge growth in related research around the world. The potential of the underlying ST approaches, however, have much wider applicability than cloaking alone, in arguably more important applications that span communications, energy transfer, sensors and security. However, theory and concepts are outstripping practical demonstration and testing, leading to a mismatch in what may be theorised and computed and what can be realised for impact in society and commerce. We contend that the timing is now ideal for UK theorists, modellers, manufacturers and engineers to work together to maintain the UK strength in this field, with a clear focus on the reduction to practice and demonstration of potentially radical new concepts and devices. Collaboration with the University of Exeter, University of St Andrews, and Queen Mary, University of London.
NanoSIMS analysis of grain boundary segregation
H. Ayuni, Dr. S. Lozano-Perez, Prof. C.R.M. Grovenor, Dr. M. Green*
High resolution SIMS analysis allows the analysis of grain segregation profiles to a statistically significant number of grain boundaries in bulk samples. This project will explore the application of this technique to both model alloys (Ni-P) and commercial B-containing steels. Supported by a Malaysian Government scholarship. *Tata Steel
Radiation damage mechanisms in Nuclear Materials
A. London, Dr. S. Lozano-Perez, Prof. C. Grovenor
Radiation damage is a major degradation mechanism in materials in nuclear reactors, affecting both the mechanical properties and the rate of chemical reactions. This project uses state-of-the-art analytical techniques to study radiation damage mechanisms in model corrosion-resistant ODS alloys processed by our partners in IGCAR in Kalpakkam and in the Key Laboratory of Materials Physics, Chinese Academy of Sciences, Hefei. We will use ion beam implantation as a proxy for neutron damage to study how the chemistry and structure of the ODS phases change as a function of dose and temperature. Funded by EPSRC grant EP/M017540/1.
Oxidation and hydriding mechanisms in Zr nuclear fuel cladding alloys
S. Yardley, Professor. S. Lozano-Perez, Professor Chris Grovenor
The critical mechanisms that lead to breakaway oxidation behaviour and delayed nydride cracking in commercial Zr alloys in reactor environments are poorly understood, and yet they are very important in controlling the safe operating lifetime of reactor fuel rods and so the fuel burnup that can be achieved. This project is using the latest generation of advanced analytical tools to study the structure and chemistry of the oxide and the oxide/metal interface at the atomic scale in order to understand how the oxidation and hydridation process might be controlled by better design of the cladding alloy. Funded by EPSRC grants EP/E036384 and EP/I003274 with support from Rolls Royce, Westinghouse and EDF, and in collaboration with the University of Manchester and the Open University.
Characterisation of Fe-based superconductors
Dr. S. Speller, Professor C.R.M. Grovenor
High resolution EDX and EBSD analysis techniques are being applied to develop a better understanding of the phase separation phenomena that may control the superconducting and magnetic properties of single crystal samples of the Fe-based superconducting family. In collaboration with E. Pomjakushina, K. Conder, Laboratory for Developments and Methods, Paul Scherrer Institut
Transparent conducting oxide thin films
Researchers: J Wang, Prof. S C Speller and Prof. C R M Grovenor
This project investigates the correlation between microstructure and properties of thin films of functional oxides deposited by sputtering and by solution chemistry. Both silicon doped ZnO and copper phosphate samples are being investigated, with particular emphasis on exploring how high resolution microstructural and microanalytical tools can help explain the different electrical and optical properties of thin films achieved as a function of deposition parameters like substrate temperature and solution chemistry. (In collaboration with the Department of Chemistry).
8 public active projects
Tayebeh Mousavi, Chris R. M. Grovenor and Susannah Speller; Effects of Processing Condition on the Properties of Fe(Se,Te) Think Films Grown by Sputtering: IEEE Transaction on Applied Superconductivity, Vol 25, Issue 3, Article No: 7500604, June 2015
Rebecca J Nicholls, Na Ni, Sergio Lozano-Perez, Chris R. M. Grovenor; Crystal Structure of the ZrO Phase at Zirconium/Zirconium Oxide Interfaces: Advanced Engineering Materials, Vol 17, Issue 2, pp. 211-215, February 2015
Jing Hu, Alistair Garner, Na Ni, Alis Gholinia, Rebecca J Nicholls, Sergio Lozano-Perez, Philipp Frankel, Michael Preuss and Chris R. M. Grovenor; Identifying suboxide grains at the metal-oxide interface of a corroded Zr-1.0%Nb alloy using (S)TEM transmission-EBSD and EELS: Micron, Vol 69, pp. 35-42, February 2015
Mousavi, T, Grovenor, C.R.M, Speller, S. C; Structural Parameters affecting Superconductivity in Iron Chalcogenides: a review: Materials Science and Technology, Vol 30, pp. 1929-1943, December 2014
Haibo Jiang, Chris N. Goulbourne, Angelica Tatar, Kirsten Turlo, Daniel Wu, Anne P. Beigneux, Chris R. M. Grovenor, Loren Fong and Stephen G. Young; High-resolution imaging of dietary lipids in cells and tissues by NanoSIMS analysis: Journal of Lipid Research, Vol 55, Issue 10, pp. 2156-2166, October 2014
Haibo Jiang, E Favaro, Chris N. Goulbourne, P. D. Rakowska, Gareth M. Hughes, M. G. Ryadnov, L. G. Fong, S. G. Young, D. J. P. Ferguson, A. L. Harris, Chris R. M. Grovenor; Stable isotope imaging of biological samples with high resolution secondary ion mass spectrometry and complementary techniques : Methods, Vol. 68, Issue 2, pp.317-324, 1 July 2014
Susannah C. Speller, P. Dudin, Stephen Fitzgerald, Gareth M. Hughes, Karen Kruska, T. Benjamin Britton, A Krzton-Maziopa, E. Pomjakushina, K Conder, A Barinov and Chris R. M. Grovenor; High-resolution characterisation of microstructural evolution in RbxFe2-ySe2 crystals on annealing: Physical Review B, Vol. 90, Issue 2, Article No:024520, 30 July 2014
Sabyasachi Baboo, Bhaskar Bhushan, Haibo Jiang, Chris R. M. Grovenor, Philippe Pierre, Benjamin G. Davis, Peter R. Cook; Most Human Proteins made in both Nucleus and Cytoplasm Turnover within Minutes: Plos One: Vol. 9, Issue 6, Article No: e99346, 9 June 2014
Chris N. Goulbourne, Peter Gin, Angelica Tatar, Chika Nobumori, Andreas Hoenger, Haibo Jiang, Chris R. M. Grovenor, Oludotun Adeyo, Jeffrey D. Esko, Ira J. Goldberg, Karen Reue, Peter Tontonoz, Andre Bensadoun, Anne P. Beigneux, Stephen G. Young, Loren G. Fong; The CPIHBP1-LPL Complex is responsible for the margination of Triglyceride-Rich Lipoproteins in Capillaries: Cell Metabolism, Vol. 19, Issue 5, pp. 849-860, 6 May 2014
Haibo Jiang, Elena Favaro, Chris N. Goulbourne, David J. P. Ferguson, Stephen G. Young, Adrian L. Harris, Chris R. M Grovenor; Quanitatively Imaging Stable Isotopes at Subcellular Level with Correlative Electron Microscopy and Nanosims Analysis: Biophysical Journal, Vol. 106, Issue 2, pp. 597A-598A, 28 January 2014
Andrew J. London, Sergio Lozano-Perez, S. Santra, S. Amirthapandian, B. K. Panigrahi, C. S. Sundar and Chris R. M. Grovenor; Comparison of atom probe tomography and transmission electron microscopy analysis of oxide dispersion strengthened steels: Journal of Physics Conference Series (Electron Microscopy and Analysis Group Conference 2013) Vol. 522, Article No 012028, 2014
Katie L. Moore, Yi Chen, Allison van de Meene, Louise Hughes, Wenju Liu, Tina Geraki, Fred Mosselmans, Steve P. McGrath, Chris R. M. Grovenor and Fang-Jie Zhao; Combined NanoSIMS and synchrotron X-ray fluorescence reveal distinct cellular and subcellular distribution patterns of trace elements in rice tissues: New Phytologist, Vol. 201, Issue 1, pp. 104-115, January 2014
Katie L. Moore, Yi Chen, Allison van de Meene, Louise Hughes, Wenju Liu, Tina Geraki, Fred Mosselmans, Steve P. McGrath, Chris R. M. Grovenor and Fang-Jie Zhao; Combined NanoSIMS and synchrotron X-ray fluorescence reveal distinct cellular and subcellular distribution patterns of trace elements in rice tissues: New Phytologist Vol. 201, Issue 1 pp. 104-115, January 2014
Sean S. Yardley, Katie L. Moore, Na Ni, Jang Fei Wei, Stuart Lyon, Michael Preuss, Sergio Lozano-Perez, Chris R. M. Grovenor; An investigation of the Oxidation Behaviour of Zirconium Alloys using Isotopic Tracers and High Resolution SIMS: Journal of Nuclear Materials, Vol. 443, Issue 1-3, pp. 436-443, November 2014
K.L Moore, C.R.M. Grovenor, Y. Chen, A.M.L. van de Meene, W. Liu, S.P. McGrath, L. Hughes, T. Geraki, F. Mosselmans, F-J. Zhao; Combined NanoSIMS and synchrotron X-ray fluorescence reveal distinct cellular and subcellular distribution patterns of trace elements in rice tissues: New Phytologist, Jan 2014, Issue I (Vol. 201) pp. 104-115.
J. Wei, P. Frankel, E.Polatidis, R.A. Cottis, S. Lyon, M. Preuss, M. Blat, A. Ambard, R. J. Comstock, L. Hallstadius, D. Hudson, G. S. W Smith. C. R. M. Grovenor, M. Klaus: The effect of Sn on autoclave corrosion performance and corrosion mechanisms in Zr-Sn-Nb alloys. Acta Materialia June 2013, Issue 11 (Vol. 61) pp. 4200-4214.
N.C. Vega, D. Comedi, F. Audebert, M. Tirado, A. Rodriguez, T. Rodriguez, G. M. Hughes, C. R. M. Grovenor; Electrical, photoelectrical and morphological properties of ZnO nanofiber networks grown on SiO and on Si nanowires: May 2013, Journal Materials Research, Issue 3 (Vol. 16) pp. 597-602.
M. Allart, F. Christien, R. Le Gall, P. Nowakowski, C. R. M. Grovenor: A multi-technique investigation of sulfur grain boundary segregation in nickel: Scripta Materialia, May 2013, Issue 10 (Vol. 68) pp 793-796.
P.D Rakowska, S. Ray, B. Lamarre, J. Ravi, J. Crain, M.G. Ryadnova, H. Jiang, C. R. M Grovenor, A. Pyne, B. W. Hoogenboom, M. Carr, P. J. Judge, A. Watts. U.I.M. Gerling, B. Koksch, G. J. Martyna: Nanoscale imaging reveals laterally expanding antimicrobial pores in lipid bilayers: Journal Proceedings of the National Academy of Sciences of the United States of America: 28 May 2013, Issue 22 (Vol. 110), pp. 8918-8923.
M. D Watson, L. J. Collins-McIntryre, L. R. Shelford, A. I Coldea, D. Prabhakaran, S. C. Speller, T. Mousavi, C. R. M. Grovenor, Z. Salman, S. R. Giblin, G. V. D. Laan, T. Hesjedal; Study of the structural, electric and magnetic properties of Mn-doped Bi 2 Te 3 single crystals: New Journal of Physics, 2013, Article 10 (Vol. 15) pp. 103016-103016.
S. S. Yardley, K. L. Moore, S. Lozano-Perez, C. R. M Grovenor, N. Ni, J. F. Wei, S. Lyon, M. Preuss; An investigation of the oxidation behaviour of zirconium alloys using isotopic tracers and high resolution SIMS: Journal of Nuclear Materials, 2013, Issue 1-3 (Vol. 443) pp. 436-443.
F. Christien, C. Downing, K. L Moore, C. R. M. Grovenor; Quantitative grain boundary analysis of bulk samples by SIMS. Journal Surface and Interface Analysis: Vol. 45, Issue 1 pp. 305-308, January 2013.
N. Ni, D. Hudson, S. Lozano-Perez, G. D. W. Smith, J. M. Sykes, S. S. Yardley, K. L. Moore, C. R. M. Grovenor, J. Wei, P. Wang, S. Lyon, R. Cottis, M. Preuss; How the crystallography and nanoscale chemistry of the metal/oxide interface develops during the aqueous oxidation of zirconium cladding alloys: Acta Materialia, December 2012, Issue 20 (Vol. 60) pp. 7132-7149.
J. H. Durrell, A. Dennis, Y. Shi, Z. Xu, A. M. Campbell, N. H. Babu, D. A. Cardwell, C. E. J. Dancer, R. I. Todd, C. R. M. Grovenor; A trapped field of >3 T in bulk MgB fabricated by uniaxial hot pressing: Superconductor Science and Technology, November 2012, Issue 11 (Vol. 25).
S. C. Speller, T. B. Britton, G. M. Hughes, C. R. M. Grovenor, A. Krzton-Maziopa, E. Pomjakushina, K. Conder, A. T. Boothroyd; Microstructural analysis of phase separation in iron chalcogenide superconductors: Superconductor Science and Technology, August 2012, Issue 8 (Vol. 25).
N. Ni, S. Lozano-Perez, J. Sykes, C. R. M. Grovenor; Multi-scale characterisation of oxide on zirconium alloys: Materials at High Temperatures, August 2012, Issue 3 (Vol. 29) pp. 166-170.
M. Mueller, G. D. W Smith, B. Gault, C. R. M. Grovenor; Phase separation in thick InGaN layers - A quantitative, nanoscale study by pulsed laser atom probe tomography: Acta Materialia, June 2012, Issue 10 (Vol. 60) pp. 4277-4285.
K. L. Moore, M. Schröder, C. R, M Grovenor; Imaging Secondary Ion Mass Spectroscopy: Handbook of Nanoscopy, 23 May 2012 (Vol. 2), pp. 709-744.
K. L. Moore, E. Lombi, F-J. Zhao, C. R. M. Grovenor; Elemental imaging at the nanoscale: NanoSIMS and complementary techniques for element localisation in plants: Anal Bioanal Chem, April 2012, Issue 10 (Vol. 402) pp. 3263-3273.
Karney, G.B., Butler, P.G. Speller, S., Scourse, J.D., Richards, C.A., Shroeder, M. Hughes, G.M. Czernuszka, J.T. and Grovenor, C.R.M; Characterizing the microstructure of Artica islandica shells using NanoSIMS and EBSD: Geochem. Geophys.Geosys. 13 (4) 2012; (7-Apr-12).
F. Christien, C. Downing, K. L. Moore, C. R. M. Grovenor; Quantification of grain boundary equilibrium segregation by NanoSIMS analysis of bulk samples: Surface and Interface Analysis, March 2012, Issue 3 (Vol. 44) pp. 377-387.
K. L. Moore, C. R. M. Grovenor, F-J Zhao, C. S. Gritsch, P. Tosi, M. J. Hawkesford, S. P. McGrath, P.R. Shewry; Localisation of iron in wheat grain using high resolution secondary ion mass spectrometry: Journal of Cereal Science, March 2012, Issue 2 (Vol. 55) pp. 183-187.
M. Mueller, G. D. W Smith, B. Gault, C. R. M Grovenor; Compositional nonuniformities in pulsed laser atom probe tomography analysis of compound semiconductors: Journal of Applied Physics, 15 March 2012, Issue 6 (Vol. 111), Article Number: ARTN 064908.
J. Moghal, H. Suttle, A. G. Cook, C. R. M. Grovenor, H. E. Assender; Investigation of the mechanical properties of aluminium oxide thin films on polymer substrates by a combination of fragmentation and scratch testing: Surface & Coatings Technology, 15 March 2012, Issue 14 (Vol. 206) pp. 3309-3315.
Katie L. Moore, Chris R. Hawes, Steve P. McGrath, Fang-Jie Zhao and Chris R.M. Grovenor; High Resolution SIMS analysis of arsenic in rice: Surf.Interface Anal. (2012) (doi 10.1002/sia.4903)
F Christien, C. Downing, K. L. Moore, C. R. M. Grovenor; Quantitative nanosims analysis of grain boundary segregation in bulk samples: TMS Annual Meeting, 2012 (Vol. 1), pp. 265-271.
C. R. M. Grovenor, D. Hudson, S. S. Yardley, K. L Moore, G. D. W. Smith, S. Lozano-Perez, J. M. Sykes, N. Ni; Mechanisms of oxidation of fuel cladding alloys revealed by high resolution APT, TEM and SIMS analysis: Materials Research Society Symposium Proceedings, 2012 (Vol. 1383) pp. 101-112.
C. R. M. Grovenor, S. S. Yardley, G. Hughes, S. Lozano-Perez, J. M. Sykes, N. Ni; 3D visualisation of crack distributions in oxidised zirconium alloys by FIB-slicing: Materials Research Society Symposium Proceedings, 2012 (Vol. 1421) pp. 24-29.
M. Mueller, B. Gault, M. Field, G. J. Sullivan, G. D. W. Smith, C. R. M. Grovenor; Interfacial chemistry in an InAs/GaSb superlattice studied by pulsed laser atom probe tomography: Applied Physics Letters, 20 February 2012, Issue 8 (Vol. 100), Article No: ARTN 083109.
S.C. Speller, T. B. Britton, G. Hughes, S. Lozano-Perez, A. T Boothroyd, E. Pomjakushina, K Conder, C. R. M. Grovenor: Analysis of local chemical and structural inhomogeneities in FeySe1-xTex single crystals: Applied Physics Letters, 7 November 2011, Issue 19 (Vol. 99), Article No. ARTN 192504.
S.C. Speller, C. Aksoy, M. Saydam, H. Taylor, G. Burnell, A. T. Boothroyd, C. R. M. Grovenor: Analysis of FeySe1-xTex thin films grown by radio frequency sputtering: Superconductor Science & Technology, July 2011, Issue 7 (Vol. 24), Article No. ARTN 075023.
Na Ni, Sergio Lozano-Perez, John Sykes, Chris Grovenor; Quantitative EELS analysis of zirconium alloy metal/oxide interfaces: Ultramicroscopy, 111 (2011) 123-130.
G. B. Karney, P.G. Butler, J.D. Scourse, C.A. Richardson, K.H. Lau, J.T. Czernuszka and C.R.M. Grovenor; Identification of growth increments in the shell of the bivalvemollusc Arctica islandica using backscattered electron imaging: J.Microsc. 241, (1) 2011, 29–36.
K. H. Lau, M. Christlieb, M. Schröder, H. Sheldon, A. L. Harris, C. R. M. Grovenor: Development of a new bimodal imaging methodology: a combination of fluorescence microscopy and high-resolution secondary ion mass spectometry: Journal of Microscopy, October 2010, Issue 1 (Vol. 240) pp. 21-31
Speller SC, Hao T, Stevens CJ, Edwards DJ, Grovenor CRM (2008) Growth of Tl2Ba2CaCu2O7 Thin Films on Curved Substrates for Metamaterial Applications 8th European Conference on Applied Superconductivity, Brussels, BELGIUM, 16 Sep 2007 - 20 Sep 2007. Editors: Hoste S, Ausloos M. 8TH EUROPEAN CONFERENCE ON APPLIED SUPERCONDUCTIVITY (EUCAS'07). IOP PUBLISHING LTD. 97
Yanmaz E, Ozturk K, Dancer CEJ, Basoglu M, Celik S, Grovenor CRM (2010) Levitation force at different temperatures and superconducting properties of nano-structured MgB2 superconductors J ALLOY COMPD 492(1-2):48-51 4
Ni N, Lozano-Perez S, Jenkins ML, English C, Smith GDW, Sykes JM, Grovenor CRM (2010) Porosity in oxides on zirconium fuel cladding alloys, and its importance in controlling oxidation rates SCRIPTA MATER 62(8):564-567
Yanmaz E, Basoglu M, Grovenor CRM (2009) Anomalous ferromagnetic behaviour of Y2O3 and CuO nanoparticles in YBa2Cu3Oy superconductor PHYS STATUS SOLIDI A 206(12):2844-2850
Moore KL, Schroder M, Lombi E, Zhao FJ, McGrath SP, Hawkesford MJ, Shewry PR, Grovenor CRM (2010) NanoSIMS analysis of arsenic and selenium in cereal grain NEW PHYTOL 185(2):434-445
Warburton PA, Saleem S, Fenton JC, Korsah M, Grovenor CRM (2009) Dissipative Enhancement of the Supercurrent in Tl2Ba2CaCu2O8 Intrinsic Josephson Junctions PHYS REV LETT 103(21): Article number 217002
Lozano-Perez S, Yamada T, Terachi T, Schroder M, English CA, Smith GDW, Grovenor CRM, Eyre BL (2009) Multi-scale characterization of stress corrosion cracking of cold-worked stainless steels and the influence of Cr content ACTA MATER 57(18):5361-5381
Dancer CEJ, Prabhakaran D, Basoglu M, Yanmaz E, Yan H, Reece M, Todd RI, Grovenor CRM (2009) Fabrication and properties of dense ex situ magnesium diboride bulk material synthesized using spark plasma sintering SUPERCOND SCI TECH 22(9): Article number 095003
Weigand M, Speller S, Rutter NA, Hughes GM, Grovenor C, Durrell (2009) Critical Current Densities of Isolated Grain Boundaries in Coated Conductors JH IEEE T APPL SUPERCON 19(3):3569-3572
Saleem S, Fenton JC, Korsah M, Speller S, Grovenor CRM, Warburton PA (2009) RF-Current Effects on Intrinsic Josephson Junctions Applied Superconductivity Conference, Chicago, IL, 17 Aug 2008 - 22 Aug 2008. IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY. IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. 19: 734-736
Yanmaz E, Savaskan B, Basoglu M, Koparan ET, Dilley NR, Grovenor CRM (2009) Complete flux jumping in nano-structured MgB2 superconductors prepared by mechanical alloying J ALLOY COMPD 480(2):203-207
Dancer CEJ, Mikheenko P, Bevan A, Abell JS, Todd RI, Grovenor CRM (2009) A study of the sintering behaviour of magnesium diboride J EUR CERAM SOC 29(9):1817-1824
Smart KE, Kilburn M, Schroeder M, Martin BGH, Hawes C, Marsh JM, Grovenor CRM (2009) Copper and calcium uptake in colored hair J COSMET SCI 60(3):337-345
Lozano-Perez S, Schroder M, Yamada T, Terachi T, English CA, Grovenor CRM (2008) Using NanoSIMS to map trace elements in stainless steels from nuclear reactors APPL SURF SCI 255(4):1541-1543
Speller SC, Dinner RB, Grovenor CRM (2008) Growth of Tl2Ba2CaCu2O8 superconducting thin films on curved substrates for metamaterials applications J CRYST GROWTH 310(18):4081-4087
Lozano-Perez S, Kilburn MR, Yamada T, Terachi T, English CA, Grovenor CRM (2008) High-resolution imaging of complex crack chemistry in reactor steels by NanoSIMS J NUCL MATER 374(1-2):61-68
Wacey D, Kilburn MR, McLoughlin N, Parnell J, Stoakes CA, Grovenor CRM, Brasier MD (2008) Use of NanoSIMS in the search for early life on Earth: ambient inclusion trails in a c. 3400 Ma sandstone J GEOL SOC LONDON 165:43-53
Fenton JC, Korsah M, Grovenor CRM, Warburton PA (2007) Switchable phase diffusion in intrinsic Josephson junction arrays 8th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors. PHYSICA C. 460: 1470-1471
Xie ZB, Henry BM, Kirov KR, Barkhouse DAR, Burlakov VM, Smith HE, Grovenor CRM, Assender HE, Briggs GAD, Kano M, et al. (2007) Correlation between photoconductivity in nanocrystalline titania and short circuit current transients in MEH-PPV/titania solar cells NANOTECHNOLOGY 18(14): Article number 145708
Smart KE, Kilburn MR, Salter CJ, Smith JAC, Grovenor CRM (2007) NanoSIMS and EPMA analysis of nickel localisation in leaves of the hyperaccumulator plant Alyssum lesbiacum INT J MASS SPECTROM 260(2-3):107-114
Ahmed, S., Titchmarsh, J.M., Kilburn, M.R. and Grovenor, C.R.M. (2006). 'Examination of the influence of boron on the microstructure and properties of low C ferritic steels using NanoSIMS and TEM' Applied Surface Science 252(19) 7062-7065.
Dark, C.J., Speller, S.C. and Grovenor, C.R.M. (2006). 'The development of bi-epitaxial texture and high grain boundary J(c) values in Tl-2212 films on MgO substrates' Superconductor Science & Technology 19(6) 484-492.
Grovenor, C.R.M., Smart, K.E., Kilburn, M.R., Shore, B., Dilworth, J.R., Martin, B., Hawes, C. and Rickaby, R.E.M. (2006). 'Specimen preparation for NanoSIMS analysis of biological materials' Applied Surface Science 252(19) 6917-6924.
Speller, S.C., Wu, H., Rek, Z.U., Bilello, J.C. and Grovenor, C.R.M. (2006). 'Development of microstructure in T1-2212 thin films and possible influence on microwave surface resistance values' Journal of Materials Research 21(7) 1645-1657.
Warburton, P.A., Fenton, J.C., Korsah, M. and Grovenor, C.R.M. (2006). 'Josephson current suppression in three-dimensional focused-ion-beam fabricated sub-micron intrinsic junctions' Superconductor Science & Technology 19(5) S187-S190.
Xie, Z., Burlakov, V.M., Henry, B.M., Kirov, K.R., Smith, H.E., Grovenor, C.R.M., Assender, H.E., Briggs, G.A.D., Kano, M. and Tsukahara, Y. (2006). 'Intensity-dependent relaxation of photoconductivity in nanocrystalline titania thin films' Physical Review B 73(11).
Xie, Z., Henry, B.M., Kirov, K.R., Smith, H.E., Barkhouse, A., Grovenor, C.R.M., Assender, H.E., Briggs, G.A.D., Webster, G.R., Burn, P.L., Kano, M. and Tsukahara, Y. (2006). 'Study of the effect of changing the microstructure of titania layers on composite solar cell performance' Thin Solid Films 511 523-528.
Daniels, M.J., Zabinski, J.S., Wu, H., Grovenor, C.R.M. and Bilello, J.C.: 'Microstructure and chemistry of annealed Al-Cu-Fe-Cr quasicrystalline approximant coatings' Journal Of Materials Research 20 (1) (2005) 176-182.
Dark, C., Speller, S., Wu, H., Sundaresan, A., Tanaka, Y., Burnell, G. and Grovenor, C.R.M.: 'Grain boundary properties of T1-2212 and T1-1223 thin films' Ieee Transactions On Applied Superconductivity 15 (2) (2005) 2931-2934.
Grovenor, C.: 'Far out - putting new materials in space' Materials World 13 (5) (2005) 26-28.
Haigh, S., Kovac, P., Prikhna, T., Savchuk, Y.M., Kilburn, M., Salter, C.J., Hutchison, J. and Grovenor, C.R.M.: 'Chemical interactions in Ti-doped MgB2 superconducting bulk samples and wires' Superconductor Science & Technology 18 (2005) 1190-1196.
Kirov, K.R., Burlakov, V.M., Carey, M.J., Henry, B.M., Xie, Z.B., Grovenor, C.R.M., Assender, H.E., Webster, G.R. and Briggs, G.A.D.: (2004). 'Non-steady state operation of polymer/TiO2 photovoltaic devices'. Nanostructured Materials In Alternative Energy Devices. Warrendale, Materials Research Society. 822: 71-76.
Erlat, A.G., Henry, B.M., Grovenor, C.R.M., Briggs, A.G.D., Chater, R.J. and Tsukahara, Y.: 'Mechanism of water vapor transport through PET/AlOxNy gas barrier films.' Journal Of Physical Chemistry B 108 (3) (2004) 883-890.
Grovenor, C.R.M., Goodsir, L., Salter, C.J., Kovac, P. and Husek, I.: 'Interfacial reactions and oxygen distribution in MgB2 wires in Fe, stainless steel and Nb sheaths.' Superconductor Science & Technology 17 (3) (2004) 479-484.
Husek, I., Kovac, P., Grovenor, C.R.M. and Goodsir, L.: 'Microhardness as a tool for filament density and metal sheath analysis in MgB2/Fe(Cu) wires.' Superconductor Science & Technology 17 (2004) 971-976.
Kovac, P., Husek, I., Melicek, T., Grovenor, C.R.M., Haigh, S. and Jones, H.: 'Improvement of the current carrying capability of ex-situ MgB2 wires by normal particale additions.' Superconductor Science & Technology 17 (2004) 1225.
Warburton, P.A., Kuzhakhmetov, A.R., Chana, O.S., Burnell, G., Blamire, M.G., Schneidewind, H., Koval, Y., Franz, A., Muller, P., Hyland, D.M.C., Dew-Hughes, D., Wu, H. and Grovenor, C.R.M.: 'Josephson fluxon flow and phase diffusion in thin-film intrinsic Josephson junctions.' Journal Of Applied Physics 95 (9) (2004) 4941-4948.
Henry B.M., Kirov K.R., Carey M.J., Grovenor C.R.M., Assender H.E., Briggs G.A.D., Webster G.R., Burn P.L., Uyama H. and Tsukahara Y.: 'Titanium dioxide/polymer photovoltaic cells' Pro. Photovoltaic Science, Applications and Technology (C79), R. Gottschaig, Loughborough, UK, (2003).
Kovac P., Husek I., Grovenor C. and Salter C.: 'Properties of as-deformed and post-annealed MgB2/Fe(Fe-alloy) composite wires' Superconductor Science & Technology 16, 292-296 (2003).
Speller S.C., Wu H.Z. and Grovenor C.R.M.: 'Buffer layers for Tl-2212 thin films on MgO and sapphire substrates' IEEE Transactions on Applied Superconductivity 13, 2713-2716 (2003).
Warburton P.A., Kuzhakhmetov A.R., Bell C., Burnell G., Blamire M.G., Wu H., Grovenor C.R.M. and Schneidewind H.: 'Sub-micron thin film intrinsic Josephson junctions' IEEE Transactions on Applied Superconductivity 13, 821-824 (2003).
Whiteley R.M., Goodall R., Moore J.C., Speller S.C. and Grovenor C.R.M.: 'Electro-epitaxial buffer layers for REBCO tape architectures' IEEE Transactions on Applied Superconductivity 13, 2639-2642 (2003).
Wu H.Z., Speller S.C., Pal S., Edwards D.J. and Grovenor C.R.M.: 'Microstructure control in the growth of large area T1-2212 thin films' IEEE Transactions on Applied Superconductivity 13, 2871-2874 (2003).
Warburton P.A., Kuzhakhmetov A.R., Chana O.S., Hyland D.M.C., Grovenor C.R.M., Burnell G., Blamire M.G. and Schneldewind H.: 'Multiple-peak switching current distribution in Tl-Ba-Ca-Cu-O intrinsic Josephson junctions' Physica C-Superconductivity and Its Applications 372, 322-326 (2002).
NanoSIMS analysis of nuclear materials
C R M Grovenor
The NanoSIMS is a very high resolution instrument for performing chemical analysis of dilute species and with an exceptional sensitivity for light elements. The NanoSIMS group have developed novel techniques for the study of trace element distributions in zirconium fuel cladding alloys exposed to corrosion in isotopically labelled water in order to explore the fundamental mechanisms of hydrogen pick up in service. This project will design and carry out experiments on both hydrogen pickup and the effect of water chemistry (Li and B in particular) on corosion processes on real ex-reactor materials provided by our project partners in Westinghouse and Canadian Nuclear Laboratories. There will be opportunities for visiting both laboratories and to work closely with leading international nuclear companies.
Also see homepages: Chris Grovenor
Microstructural analysis of irradiated nuclear fuel cladding alloys
C R M Grovenor
Over the past several years we have developed novel techniques for the study of the microstructure and nano-chemistry of zirconium fuel cladding alloys exposed to aqueous corrosion. However, these techniques have rarely been applied to materials exposed to neutron irradiation damage. This project will design and carry out experiments on ex-reactor materials provided by our project partners in Westinghouse and Canadian Nuclear Laboratories to explore how irradiated materials differ from those corroded in an autoclave. The student will become an expert user of high resolution analytic microscopy techniques, and there will be opportunities to work closely with leading international nuclear companies on the design of improved alloys that will enable the more efficient use of nuclear fuels.
Also see homepages: Chris Grovenor
A new way to manufacture high performance NbTi superconducting wires
C R M Grovenor / S C Speller
The workhorse material for high field superconducting magnets has for many years been a 2 phase NiTi alloy processed by a long and complex thermomechanical process to give a microstructure optimised to give strong flux pinning. The use of artificial pinning centres to achieve even better superconducting performance has been explored in industry, but rejected because it is too expensive. Working in the new Centre for Applied Superconductivity (www.cfas.ox.ac.uk), this project will explore an alternative route to give a microstructure that gives strong flux pinning in a simple two-stage process. The student will be involved in the metallurgical processing, microstructural assessment and superconducting property measurements on the new alloys, with advice and close interaction from our industrial partners.
Radiation damage in superconducting materials for Fusion applications
S C Speller / C R M Grovenor
Future designs of Fusion power machines will require superconducting magnet winding, and these superconductors will in service be subjected to high fluxes of energetic particles. However, little is known about the effect of the lattice damage resulting from these interactions on the superconducting properties, especially in 2nd generation high temperature superconducting tapes. This studentship is a collaboration with a local company, Tokamak Energy. The project will use advanced electron microscopy techniques to identify the key damage mechanisms in a range of different superconducting materials exposed to high energy particles, and to correlate these with direct superconducting property measurements. This project is offered by the University of Oxford as part of the Fusion CDT programme. Please contact Professor Chris Grovenor for more information.
Ultra low resistance joints for high temperature superconducting magnets
S C Speller / C R M Grovenor
The next generation of ultra high field magnets are starting to require the use of high temperature superconducting materials. These magnets will require several kinds of very low resistance (persistent) joints between superconducting wires that can operate reliably in high magnetic fields. So far few potential solutions to overcoming the serious materials challenges in manufacturing these joints have been reported. The student, working closely with our industrial partners Oxford Instruments, will use new facilities in the Centre for Applied Superconductivity (cfas.ox.ac.uk) to design novel processes to form joints between commercial wires, and measure their performance. The initial focus of the work will be on the state-of-the-art multifilamentary wires from Oxford Superconducting Technology. There will be opportunities for the student to spend time in the laboratories of Oxford Instruments, and to become an expert in the correlation of microstructure with superconducting properties of materials critical for future magnet designs.
Bulk superconducting MgB2 magnets for biomedical applications
S C Speller / C R M Grovenor
Magnetic Resonance Imaging (MRI) is a very widely used technique for medical diagnosis, but the current instruments based on superconducting solenoids are large and expensive. There are emerging designs for much smaller and cheaper instruments for knees, elbows, wrists etc based on bulk superconductors acting as permanent magnets. Permanent magnets also have potential applications in novel drug delivery systems. Magnesium diboride (MgB2) is a possible material to use in this application, and this project will focus on the fabrication of bulk MgB2 materials in collaboration with our industrial partners Element Six. Working in the new Centre for Applied Superconductivity (www.cfas.ox.ac.uk) the student will be involved in powder processing of the precursor material, the design of processing conditions (T and P), and the correlation of the resulting microstructure with superconducting properties, with the aim of optimising the field that can be trapped in the smallest possible volume. There will be opportunities to integrate your material with test devices in the Institute for Biomedical Engineering.
Nitride superconducting films for quantum device applications
S C Speller / C R M Grovenor
Many of the most exciting advances in quantum technologies rely on very high quality resonant circuits fabricated in superconducting materials. Simple Al or Nb films can be used, but many of the most impressive results have been achieved with nitride films as the superconducting material because they offer greater stability to atmospheric attack and oxidation and so are less lossy. Previous work on TiN films has shown that the stoichiometry uniformity, oxygen content, resistivity, texture and residual strain all have a significant impact on resonance performance, and that film uniformity over large areas will be an important issue in future more complex circuit designs. Although high quality VN and MoN thin films with excellent superconducting properties can be deposited, these materials have not been much tested for use in resonant circuits. The objective of this project is to explore a wider range of new superconducting compounds and alloys, (Nb,Mo,Ti)N for example, for low loss resonant structures. The student, working closely with our industrial partners Oxford Instruments, will use the new thin film growth and characterisation facilities in the Centre for Applied Superconductivity (www.cfas.ox.ac.uk) to deposit and measure the properties of nitride thin films, and to assist in the testing of resonator performance with the quantum technology groups in both Physics and Materials Departments.
Also see homepages: Chris Grovenor
Also see a full listing of New projects available within the Department of Materials.