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Dr Guillaume F Nataf

Dr Guillaume F Nataf

CNRS Research Scientist

Research Interests

My research focuses on functional oxides (ferroelectrics and ferroelastics), whose outstanding properties result from a complex interaction between chemical compositions, crystallographic orientations and micro/nanostructures. I am particularly interested in micro/nanostructures (pores, domains, domain walls) and:

  • the evolution of their structural properties across phase transitions,
  • their response under constraint,
  • the characterisation and understanding of their own functionalities,
  • their role in thermal properties of materials.

One application I am focusing on is the design and optimisation of new barocaloric materials with outstanding performance.

Key Publications

  • G. F. Nataf, M. Guennou, J. M. Gregg, D. Meier, J. Hlinka, E. K. H. Salje, J. Kreisel. Domain-wall engineering and topological defects in ferroelectric and ferroelastic materials. Nature Reviews Physics 2, 634-648 (2020) – doi: 10.1038/s42254-020-0235-z
  • G. F. Nataf, M. Guennou, G. Scalia, X. Moya, T. D. Wilkinson, J. P. F. Lagerwall. High-contrast imaging of 180° ferroelectric domains by optical microscopy using ferroelectric liquid crystals. Applied Physics Letters 116, 212901 (2020) – doi: 10.1063/5.0008845
  • G. F. Nataf, M. Guennou, J. Kreisel, P. Hicher, R. Haumont, O. Aktas, E. K. H. Salje, L. Tortech, C. Mathieu, D. Martinotti, N. Barrett. Control of surface potential at polar domain walls in a nonpolar oxide. Phys. Rev. Mater. 1, 74410 (2017) – doi: 10.1103/PhysRevMaterials.1.074410
  • G. F. Nataf, P. Grysan, M. Guennou, J. Kreisel, D. Martinotti, C. L. Rountree, C. Mathieu, N. Barrett. Low energy electron imaging of domains and domain walls in magnesium-doped lithium niobate. Sci. Rep. 6, 33098 (2016) – doi: 10.1038/srep33098
  • G. F. Nataf, P. O. Castillo-Villa, J. Baró, X. Illa, E. Vives, A. Planes, E. K. H. Salje. Avalanches in compressed porous SiO2-based materials. Phys. Rev. E 90, 022405 (2014) – doi: 10.1103/PhysRevE.90.022405
  • E. K. H. Salje, M. Carpenter, G. F. Nataf, G. Picht, K. Webber, J. Weerasinghe, S. Lisenkov, L. Bellaiche. Elastic excitations in BaTiO3 single crystals and ceramics: Mobile domain boundaries and polar nanoregions observed by RUS. Phys. Rev. B 87, 014106 (2013) – doi: 10.1103/PhysRevB.87.014106