Annuaire
Personnel de recherche CNRS
M. Guillaume Nataf
Chargé de recherche CNRSCoordonnées
- Tél
- 0254552166
- guillaume.nataf@univ-tours.fr
Discipline(s) enseignée(s)
Lecturer and demonstrator for master students in materials science (optics, Maxwell equations, Raman spectroscopy)
Demonstrator for undergraduate students in materials science (calorimetry, X-rays diffraction) and electronics
Demonstrator for undergraduate students in materials science (calorimetry, X-rays diffraction) and electronics
Thèmes de recherche
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.
Group members
Lucile Féger, PhD student (co-supervised with Isabelle Laffez)
Joachim Montoussé, PhD student (with the French company Soitec, co-supervised with Silvana Mercone, Kevin Nadaud, Micka Bah)
Vijaya Bhasker, PhD student (co-supervised with Fabien Giovannelli)
Nassima Radouane, postdoc
Khalid Ait Ali, master student (co-supervised with Mustapha Zaghrioui)
Yersultan Rymkul, master student (co-supervised with Konstantinos Termentzidis)
Previous group members
Rachid Belrhiti-Nejjar, master student (now PhD student at GREMAN)Edgar Chaslin, master student (now PhD student at University of Rennes)
Mehdi El Kamily, master student
Activités / CV
Key Publications
- G. F. Nataf, S. Volz, J. Ordonez-Miranda, J. Íñiguez-González, R. Rurali, B. Dkhil. Using oxides to cumpute with heat. Nat. Rev. Mater. (2024) – doi: 10.1038/s41578-024-00690-1.
- P. Limelette, M. El Kamily, H. Aramberri, F. Giovannelli, M. Royo, R. Rurali, I. Monot-Laffez, J.Íñiguez, G. F. Nataf. Influence of ferroelastic domain walls on thermal conductivity. Phys. Rev. B 108, 144104 (2023) – doi: 10.1103/PhysRevB.108.144104
- 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, 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. 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.87.01410
Invited talks
- Ferroelectric and ferroelastic domain walls: interfaces to tune thermal conductivity. Energy transfer at interfaces. Paris, France, 2023.
- Solid-state synthesis. EL NANO thematic school. Aussois, France, 2023.
- Domain-wall engineering in multiferroic materials. Annual meeting of the German Physical Society on Condensed Matter Physics. Regensburg, Germany, 2022.
- Avalanches in ferroelectric and ferroelastic materials. Avalanche dynamics and precursors of catastrophic events. Debrecen, Hungary, 2022.
- Multiferroic domain walls in ferroelastic materials. 9th International Advances in Applied Physics & Materials Science Congress & Exhibition. Ölüdeniz, Turkey, 2019.
- Towards giant barocaloric materials with low hysteresis. EMN Meeting on Caloric Materials. Lyon, France, 2018.
- High-pressure calorimetric methods for barocaloric materials. Short Summer School on TA&C. Chisinau, Moldavia, 2017
Selected research projects
- ERC Starting Grant (2023-2027): Ferroic Materials for Dynamic Heat Flow Control [leader]
- EIC Pathfinder (2024-2028): First Regenerative Solid-State Barocaloric Refrigerator
- ANR PRC (2024-2028): Study and sintering of molecular compounds for barocaloric refrigeration
- APRIA (2022): Influence of domain walls on the thermal conductivity of ferroelectric oxides [leader]
- 1851 Research Fellowship (2018-2020): Colossal barocaloric effects in liquid crystals [leader]