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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.121  No.1411 (March) (2013)  >  pp.265-267

Journal of the Ceramic Society of Japan
<<Previous article Vol.121  No.1411 (March) (2013)   pp.265 - 267 Next article>>

Structural investigation of magnetocapacitive SmMnO3

Hiroki MAEDA1), Yuki ISHIGURO1), Takashi HONDA1), Jong-Suck JUNG1), Shinji MICHIMURA2), Toshiya INAMI2), Tsuyoshi KIMURA1), Yusuke WAKABAYASHI1)
1) Division of Materials Physics, Graduate School of Engineering Science, Osaka University 2) Condensed Matter Science Division, Japan Atomic Energy Agency

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.

Magnetocapacitive effect, X-ray diffraction, Magnetic field, Perovskite oxide, Synchrotron radiation

Received: September 26, 2012
Accepted: November 07, 2012 , Published online: March 01, 2013
Copyright © 2013 The Ceramic Society of Japan



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