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

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 09期

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.

引用

页数：4

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