Magnetic-field-induced ferroelectric state in DyFeO3

被引:441
作者
Tokunaga, Y. [1 ]
Iguchi, S. [2 ]
Arima, T. [3 ]
Tokura, Y. [1 ,2 ,4 ,5 ]
机构
[1] Japan Sci & Technol Agcy JST, ERATO, Multiferro Project, Wako, Saitama 3510198, Japan
[2] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan
[3] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan
[4] Natl Inst Adv Ind Sci & Technol, CERC, Tsukuba, Ibaraki 3058562, Japan
[5] RIKEN, ASI, Cross Correlated Mat Res Grp CMRG, Wako, Saitama 3510198, Japan
关键词
D O I
10.1103/PhysRevLett.101.097205
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Versatile and gigantic rnagnetoelectric (ME) phenomena have been found for a single crystal of DyFeO3. Below the antiferromagnetic ordering temperature of Dy moments, a linear-ME tensor component as large as alpha(zz) similar to 2.4 X 10(-2) esu is observed. It is also revealed that application of magnetic field along the c axis induces a multiferroic (weakly ferromagnetic and ferroelectric) phase with magnetization [>= 0.5 mu(B)/formula unit (f.u,)] and electric polarization (>= 0.2 mu C/cm(2)) both along the c axis. Exchange striction working between adjacent Fe3+ and Dy3+ layers with the respective layered antiferromagnetic components is proposed as the origin of the ferroelectric polarization in the multiferroic phase.
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页数:4
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