Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
ISSN-L : 1348-6535
Feature: Science and Technology for Advanced Sustainable Ceramics: Papers
Structural investigation of magnetocapacitive SmMnO3
Hiroki MAEDA, Yuki ISHIGURO, Takashi HONDA, Jong-Suck JUNG, Shinji MICHIMURA, Toshiya INAMI, Tsuyoshi KIMURA, Yusuke WAKABAYASHI
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Keywords: Magnetocapacitive effect, X-ray diffraction, Magnetic field, Perovskite oxide, Synchrotron radiation
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2013 Volume 121 Issue 1411 Pages 265-267

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Abstract

Structural deformation of a magnetocapacitive material SmMnO3 was studied by X-ray diffraction measurement in a magnetic field. This antiferromagnetic material shows a jump in dielectric constant at 9 K only when a magnetic field of a few tesla is applied. In-field X-ray diffraction measurements clarified that there is no sudden change in structure that involves atomic displacement within the c-plane in Pbnm notation, while the antiferromagnetic phase transition at 60 K gives rise to a noticeable rotation of the MnO6 octahedra. This rotation occurs to maximize the energy gain through the exchange interaction.

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© 2013 The Ceramic Society of Japan
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