Internal magnetic field effect on magnetoelectricity in orthorhombic RMnO3 crystals

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:310

Article; Proceedings Paper

Noda, K. ; Akaki, M. ; Nakamura, F. ; Akahoshi, D. ; Kuwahara, H.

关键词: multiferroics;    magnetoelectric effect;    ferroelectrics;    antiferromagnetism;   

DOI  :  10.1016/j.jmmm.2006.10.337

来源: Elsevier

【 摘 要 】

We have investigated the role of the 4f moment on the magnetoelectric (ME) effect of orthorhombic RMnO3 (R = rare earth ions). In order to clarify the role of the 4f moment, we prepared three samples: (Eu, Y)MnO3 without the 4f moment, TbMnO3 with the anisotropic 4f moment, and (Gd, Y)MnO3 with the isotropic 4f moment. The ferroelectric behaviors of these samples are different from each other in a zero magnetic field. (Eu, Y)MnO3 and (Gd, Y)MnO3 show the ferroelectric polarization along the a axis in the ground state, while TbMnO3 shows it along the c axis. Such difference may arise from the influence of the anisotropic Tb3+ 4f moment. The direction of the ferroelectric polarization of RMnO3 is determined by the internal magnetic field arising from the 4f moment. (c) 2006 Published by Elsevier B.V.

【 授权许可】

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