Displacement-Type Ferroelectricity with Off-Center Magnetic Ions in Perovskite<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>Sr</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo mathvariant="bold">−</mml:mo><mml:mi mathvariant="bold-italic">x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi>Ba</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mi>MnO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math>

Sakai, Hideaki; Fujioka, J.; Fukuda, Tatsuo; Okuyama, Daisuke; Hashizume, Daisuke; Kagawa, Fumitaka; Nakao, Hironori; Murakami, Youichi; Arima, T.; Q. R. Baron, Alfred; Taguchi, Y.; Tokura, Yoshinori

doi:10.1103/physrevlett.107.137601

Public

Displacement-Type Ferroelectricity with Off-Center Magnetic Ions in PerovskiteSr1−xBaxMnO3

Published in Physical Review Letters • Sep 19, 2011

Authors:

Hideaki Sakai

J. Fujioka

Tatsuo Fukuda

Abstract

We report a ferroelectric transition driven by the off-centering of magnetic Mn(4+) ions in antiferromagnetic Mott insulators Sr(1-x)Ba(x)MnO(3) with a perovskite structure. As x increases, the perovskite lattice shows the typical soft-mode dynamics, as revealed by the momentum-resolved inelastic x-...

Subject

Ferroelectricity

Antiferromagnetism

Condensed matter physics

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