Comptes Rendus
Neutron scattering/Diffusion de neutrons
Magnetic neutron diffraction under high pressure
Comptes Rendus. Physique, Neutron scattering: a comprehensive tool for condensed matter research, Volume 8 (2007) no. 7-8, pp. 737-744.

Applying high pressure in neutron diffraction provides a microscopic understanding of the magnetic order and magnetic interactions in materials under extreme conditions. By checking the dependence of interactions over a wide range of interatomic distances, this technique also allows testing microscopic models at ambient pressure. Recent instrumental progress in high pressure neutron diffraction now allows magnetic materials to be measured in an unprecedented range of pressures, possibly combined with very low temperatures and high magnetic fields. A few examples chosen in model ferromagnets, solid oxygen or geometrically frustrated magnets give some insight into the possibilities of this technique.

L'application de hautes pressions, combinée à la diffraction de neutrons permet de comprendre au niveau microscopique l'ordre et les interactions magnétiques dans les matériaux en conditions extrêmes. En vérifiant les lois de variations des interactions dans un large domaine de distances interatomiques, cette technique permet aussi de tester la validité de modèles microscopiques à pression ambiante. De récents progrès instrumentaux en diffraction de neutrons sous haute pression offrent maintenant la possibilité de mesurer des matériaux magnétiques dans une gamme de pression inégalée, et de combiner l'application de hautes pressions à celle de très basses températures et de forts champs magnétiques. Quelques exemples choisis dans des ferromagnétiques modèles, l'oxygène solide ou des composés géométriquement frustrés donnent un aperçu des possibilités offertes par cette technique.

Published online:
DOI: 10.1016/j.crhy.2007.09.020
Keywords: Neutron diffraction, High pressure, Magnetism
Mots-clés : Diffraction de neutrons, Haute pression, Magnétisme

Isabelle Mirebeau 1

1 Laboratoire Léon Brillouin, CEA–CNRS, CE-Saclay, 91191 Gif-sur-Yvette, France
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Isabelle Mirebeau. Magnetic neutron diffraction under high pressure. Comptes Rendus. Physique, Neutron scattering: a comprehensive tool for condensed matter research, Volume 8 (2007) no. 7-8, pp. 737-744. doi : 10.1016/j.crhy.2007.09.020. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2007.09.020/

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