Experimental evidence for the microscopic mechanism of the unusual spin-induced electric polarization in GdMn 2 O 5

Abstract : We report in this paper the temperature evolution of the magnetic structure of GdMn 2 O 5 , in the range 2-40 K, studied by neutron diffraction on an isotope-enriched powder. We detail a thorough analysis of the microscopic mechanisms needed to release the different magnetic frustrations that are at the origin of the polarization. In addition to the usual exchange-striction term, known to be at the origin of the polarization in this family, an additional exchange-striction effect between the Gd 3+ and Mn 3+ spins is found to be responsible for the very large polarization in the Gd compound.
Type de document :
Article dans une revue
Physical Review B : Condensed matter and materials physics, American Physical Society, 2018, 97 (8), pp.085128. 〈10.1103/PhysRevB.97.085128〉
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-02000629
Contributeur : Simone Fratini <>
Soumis le : jeudi 31 janvier 2019 - 11:11:26
Dernière modification le : mercredi 13 février 2019 - 10:06:09

Lien texte intégral

Identifiants

Citation

G. Yahia, F. Damay, S. Chattopadhyay, V. Balédent, W. Peng, et al.. Experimental evidence for the microscopic mechanism of the unusual spin-induced electric polarization in GdMn 2 O 5. Physical Review B : Condensed matter and materials physics, American Physical Society, 2018, 97 (8), pp.085128. 〈10.1103/PhysRevB.97.085128〉. 〈hal-02000629〉

Partager

Métriques

Consultations de la notice

13