Giant magnetoelectric effect in the Jeff = 1/2 Mott insulator Sr2IrO4

S. Chikara; O. Korneta; W. P. Crummett; L. E. Delong; P. Schlottmann; G. Cao

doi:10.1103/PhysRevB.80.140407

Giant magnetoelectric effect in the J_eff = 1/2 Mott insulator Sr₂IrO₄

S. Chikara, O. Korneta, W. P. Crummett, L. E. Delong, P. Schlottmann, G. Cao

Physics And Astronomy

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

108 Scopus citations

Abstract

Our magnetic, electrical, and thermal measurements on single crystals of the J_eff =1/2 Mott insulator, Sr₂ IrO₄, reveal a giant magnetoelectric effect (GME) arising from a frustrated magnetic/ferroelectric state whose signatures are: (1) a strongly enhanced electric permittivity that peaks near an observed magnetic anomaly at 100 K, and (2) a large (∼100%) magnetodielectric shift that occurs near a metamagnetic transition. The GME hinges on a spin-orbit gapping of 5d bands rather than the magnitude and spatial dependence of magnetization, as traditionally accepted.

Original language	English
Article number	140407
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	80
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.80.140407
State	Published - Oct 19 2009

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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abstract = "Our magnetic, electrical, and thermal measurements on single crystals of the Jeff =1/2 Mott insulator, Sr2 IrO4, reveal a giant magnetoelectric effect (GME) arising from a frustrated magnetic/ferroelectric state whose signatures are: (1) a strongly enhanced electric permittivity that peaks near an observed magnetic anomaly at 100 K, and (2) a large (∼100%) magnetodielectric shift that occurs near a metamagnetic transition. The GME hinges on a spin-orbit gapping of 5d bands rather than the magnitude and spatial dependence of magnetization, as traditionally accepted.",

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AU - Chikara, S.

AU - Korneta, O.

AU - Crummett, W. P.

AU - Delong, L. E.

AU - Schlottmann, P.

AU - Cao, G.

PY - 2009/10/19

Y1 - 2009/10/19

N2 - Our magnetic, electrical, and thermal measurements on single crystals of the Jeff =1/2 Mott insulator, Sr2 IrO4, reveal a giant magnetoelectric effect (GME) arising from a frustrated magnetic/ferroelectric state whose signatures are: (1) a strongly enhanced electric permittivity that peaks near an observed magnetic anomaly at 100 K, and (2) a large (∼100%) magnetodielectric shift that occurs near a metamagnetic transition. The GME hinges on a spin-orbit gapping of 5d bands rather than the magnitude and spatial dependence of magnetization, as traditionally accepted.

AB - Our magnetic, electrical, and thermal measurements on single crystals of the Jeff =1/2 Mott insulator, Sr2 IrO4, reveal a giant magnetoelectric effect (GME) arising from a frustrated magnetic/ferroelectric state whose signatures are: (1) a strongly enhanced electric permittivity that peaks near an observed magnetic anomaly at 100 K, and (2) a large (∼100%) magnetodielectric shift that occurs near a metamagnetic transition. The GME hinges on a spin-orbit gapping of 5d bands rather than the magnitude and spatial dependence of magnetization, as traditionally accepted.

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Giant magnetoelectric effect in the J_eff = 1/2 Mott insulator Sr₂IrO₄

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