Spin Structure Change in Co-Substituted BiFeO3

被引：28

作者：

Yamamoto, Hajime ^{[1
]}

Kihara, Takumi ^{[2
,5
]}

Oka, Kengo ^{[3
]}

Tokunaga, Masashi ^{[2
]}

Mibu, Ko ^{[4
]}

Azuma, Masaki ^{[1
]}

机构：

[1] Tokyo Inst Technol, Lab Mat & Struct, Yokohama, Kanagawa 2268503, Japan

[2] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[3] Chuo Univ, Depertment Appl Chem, Fac Sci & Engn, Bunkyo Ku, Tokyo 1128551, Japan

[4] Nagoya Inst Technol, Grad Sch Engn, Nagoya, Aichi 4668555, Japan

[5] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2016年 / 85卷 / 06期

基金：

日本学术振兴会;

关键词：

MAGNETIC CONTROL; TEMPERATURE; MOSSBAUER;

D O I：

10.7566/JPSJ.85.064704

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The spin structure in BiFe1-xCoxO3 (x = 0.05, 0.10, 0.15, 0.20) was investigated as a function of Co substitution, temperature, and magnetic field. It was found that the cycloidal spin structure of BiFeO3 changed to a collinear one with spin canting and composition-independent spontaneous magnetization of similar to 0.25 mu B/f.u. for the Co substituted samples on heating. The collinear phase was stabilized under magnetic fields. The spin structure change was clarified also by the temperature dependence of Fe-57 Mossbauer spectra, and the results indicated the first order nature of this transition.

引用

页数：4

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