Magnetic-Field-Induced Polarization Flop in Multiferroic TmMn2O5

被引：51

作者：

Fukunaga, M. ^{[1
]}

Sakamoto, Y. ^{[1
]}

Kimura, H. ^{[1
]}

Noda, Y. ^{[1
]}

Abe, N. ^{[1
]}

Taniguchi, K. ^{[1
]}

Arima, T. ^{[1
]}

Wakimoto, S. ^{[2
]}

Takeda, M. ^{[2
]}

Kakurai, K. ^{[2
]}

Kohn, K. ^{[3
]}

机构：

[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

[2] Japan Atom Energy Agcy, Tokai, Ibaraki 3191195, Japan

[3] Waseda Univ, Dept Phys, Tokyo 1698555, Japan

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 07期

关键词：

Rare earths - Polarization - Silicon compounds - Manganese compounds - Neutron diffraction - Thulium compounds;

D O I：

10.1103/PhysRevLett.103.077204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We discovered a reversible electric polarization flop from the a axis (P-a) to the b axis (P-b) in multiferroic TmMn2O5 below 5 K by applying a magnetic field of approximately 0.5 T along the c axis. This phenomenon is the first example of the rare-earth (R) compound RMn2O5. This magnetic-field-induced polarization flop corresponds to a magnetic phase transition from one incommensurate magnetic (ICM) P-a phase to another ICM P-b phase, which is equivalent to an ICM P-b phase above 5 K under no magnetic field. The spin chirality in the bc plane, which was observed in the P-b phase by polarized neutron diffraction, disappeared in the ICM P-a phase. This indicates that the polarization in the ICM phases of TmMn2O5 was induced by an S-i x S-j-type interaction.

引用

页数：4

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