Experimental evidence for the microscopic mechanism of the unusual spin-induced electric polarization in GdMn2 O5

G. Yahia; F. Damay; S. Chattopadhyay; V. Balédent; W. Peng; S. W. Kim; M. Greenblatt; M. B. Lepetit; P. Foury-Leylekian

doi:10.1103/PhysRevB.97.085128

Experimental evidence for the microscopic mechanism of the unusual spin-induced electric polarization in GdMn2 O5

G. Yahia, F. Damay, S. Chattopadhyay, V. Balédent, W. Peng, S. W. Kim, M. Greenblatt, M. B. Lepetit, P. Foury-Leylekian

School of Arts and Sciences, Chemistry & Chemical Biology

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

We report in this paper the temperature evolution of the magnetic structure of GdMn2O5, 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 Gd3+ and Mn3+ spins is found to be responsible for the very large polarization in the Gd compound.

Original language	English (US)
Article number	085128
Journal	Physical Review B
Volume	97
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevB.97.085128
State	Published - Feb 15 2018

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.97.085128

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title = "Experimental evidence for the microscopic mechanism of the unusual spin-induced electric polarization in GdMn2 O5",

abstract = "We report in this paper the temperature evolution of the magnetic structure of GdMn2O5, 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 Gd3+ and Mn3+ spins is found to be responsible for the very large polarization in the Gd compound.",

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AU - Yahia, G.

AU - Damay, F.

AU - Chattopadhyay, S.

AU - Balédent, V.

AU - Peng, W.

AU - Kim, S. W.

AU - Greenblatt, M.

AU - Lepetit, M. B.

AU - Foury-Leylekian, P.

PY - 2018/2/15

Y1 - 2018/2/15

N2 - We report in this paper the temperature evolution of the magnetic structure of GdMn2O5, 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 Gd3+ and Mn3+ spins is found to be responsible for the very large polarization in the Gd compound.

AB - We report in this paper the temperature evolution of the magnetic structure of GdMn2O5, 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 Gd3+ and Mn3+ spins is found to be responsible for the very large polarization in the Gd compound.

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Experimental evidence for the microscopic mechanism of the unusual spin-induced electric polarization in GdMn2 O5

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