Evolution of magnetic phases in single crystals of SrFe1-xCoxO3 solid solution

被引：39

作者：

Long, Y. W. ^{[1
,2
]}

Kaneko, Y. ^{[1
,3
,4
]}

Ishiwata, S. ^{[6
,7
]}

Tokunaga, Y. ^{[3
,4
]}

Matsuda, T. ^{[6
,7
]}

Wadati, H. ^{[6
,7
]}

Tanaka, Y. ^{[5
]}

Shin, S. ^{[5
,8
]}

Tokura, Y. ^{[1
,3
,4
,6
,7
]}

Taguchi, Y. ^{[3
,4
]}

机构：

[1] RIKEN Adv Sci Inst, Japan Sci & Technol Agcy, Exploratory Res Adv Technol, Multiferro Project, Wako, Saitama 3510198, Japan

[2] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[3] RIKEN Adv Sci Inst, Cross Correlated Mat Res Grp CMRG, Wako, Saitama 3510198, Japan

[4] RIKEN Adv Sci Inst, CERG, Wako, Saitama 3510198, Japan

[5] RIKEN SPring 8 Ctr, Sayo, Hyogo 6795148, Japan

[6] Univ Tokyo, QPEC, Tokyo 1138656, Japan

[7] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

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

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 06期

基金：

日本学术振兴会;

关键词：

ELECTRONIC-STRUCTURE; GROUND-STATE; SRCOO3; SRFEO3;

D O I：

10.1103/PhysRevB.86.064436

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Single crystals of SrFe1-xCoxO3 solid solution with high valence ions (Fe4+/Co4+) were synthesized by combining floating-zone and high-pressure oxygen-annealing techniques. As the Co content (x) is increased, the ground state changes from the helimagnetic state (x <= 0.05) through cluster glass to the ferromagnetic state (x >= 0.2), with a high Curie temperature ranging between 245 and 337 K. We found that, within the helimagnetic state (x <= 0.05), several different magnetic phases, which possibly reflect versatile three-dimensional helical orders with multiple wave vectors, emerge depending on temperature and magnetic field strength. In addition, we observed Co-concentration-dependent systematic evolution of the complex magnetic phase diagram. Resonant soft x-ray diffraction measurements revealed a gradual decrease in the wave vector of the helix toward the ferromagnetic phase.

引用

页数：8

共 39 条

[1] X-ray absorption of the negative charge-transfer material SrFe1-xCoxO3 -: art. no. 165120 [J].