中国物理B ›› 2019, Vol. 28 ›› Issue (6): 68104-068104.doi: 10.1088/1674-1056/28/6/068104

所属专题: Virtual Special Topic — Magnetism and Magnetic Materials

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Spin glassy behavior and large exchange bias effect in cubic perovskite Ba0.8Sr0.2FeO3-δ

Yu-Xuan Liu(刘宇轩), Zhe-Hong Liu(刘哲宏), Xu-Bin Ye(叶旭斌), Xu-Dong Shen(申旭东), Xiao Wang(王潇), Bo-Wen Zhou(周博文), Guang-Hui Zhou(周光辉), You-Wen Long(龙有文)   

  1. 1 Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications of Hunan Province, Hunan Normal University, Changsha 410081, China;
    2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    3 School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China;
    4 Songshan Lake Materials Laboratory, Dongguan 523808, China
  • 收稿日期:2019-03-05 修回日期:2019-03-26 出版日期:2019-06-05 发布日期:2019-06-05
  • 通讯作者: Guang-Hui Zhou, You-Wen Long E-mail:ghzhou@hunnu.edu.cn;ywlong@iphy.ac.cn
  • 基金资助:

    Project supported by the National Key Research and Development Program of China (Grant Nos. 2018YFA0305700 and 2018YFGH000095), the National Natural Science Foundation of China (Grant Nos. 51772324 and 11574378), and the Fund from the Chinese Academy of Sciences (Grant No. QYZDB-SSW-SLH013, GJHZ1773).

Spin glassy behavior and large exchange bias effect in cubic perovskite Ba0.8Sr0.2FeO3-δ

Yu-Xuan Liu(刘宇轩)1,2, Zhe-Hong Liu(刘哲宏)2,3, Xu-Bin Ye(叶旭斌)2,3, Xu-Dong Shen(申旭东)2,3, Xiao Wang(王潇)2,3, Bo-Wen Zhou(周博文)2,3, Guang-Hui Zhou(周光辉)1, You-Wen Long(龙有文)2,4   

  1. 1 Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications of Hunan Province, Hunan Normal University, Changsha 410081, China;
    2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    3 School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China;
    4 Songshan Lake Materials Laboratory, Dongguan 523808, China
  • Received:2019-03-05 Revised:2019-03-26 Online:2019-06-05 Published:2019-06-05
  • Contact: Guang-Hui Zhou, You-Wen Long E-mail:ghzhou@hunnu.edu.cn;ywlong@iphy.ac.cn
  • Supported by:

    Project supported by the National Key Research and Development Program of China (Grant Nos. 2018YFA0305700 and 2018YFGH000095), the National Natural Science Foundation of China (Grant Nos. 51772324 and 11574378), and the Fund from the Chinese Academy of Sciences (Grant No. QYZDB-SSW-SLH013, GJHZ1773).

摘要:

A single-phase iron oxide Ba0.8Sr0.2FeO3-δ with a simple cubic perovskite structure in Pm-3m symmetry is successfully synthesized by a solid-state reaction method in O2 flow. The oxygen content is determined to be about 2.81, indicating the formation of mixed Fe3+ and Fe4+ charge states with a disorder fashion. As a result, the compound shows small-polaron conductivity behavior, as well as spin glassy features arising from the competition between the ferromagnetic interaction and the antiferromagnetic interaction. Moreover, the competing interactions also give rise to a remarkable exchange bias effect in Ba0.8Sr0.2FeO2.81, providing an opportunity to use it in spin devices.

关键词: high-pressure synthesis, exchange bias effect, spin glass

Abstract:

A single-phase iron oxide Ba0.8Sr0.2FeO3-δ with a simple cubic perovskite structure in Pm-3m symmetry is successfully synthesized by a solid-state reaction method in O2 flow. The oxygen content is determined to be about 2.81, indicating the formation of mixed Fe3+ and Fe4+ charge states with a disorder fashion. As a result, the compound shows small-polaron conductivity behavior, as well as spin glassy features arising from the competition between the ferromagnetic interaction and the antiferromagnetic interaction. Moreover, the competing interactions also give rise to a remarkable exchange bias effect in Ba0.8Sr0.2FeO2.81, providing an opportunity to use it in spin devices.

Key words: high-pressure synthesis, exchange bias effect, spin glass

中图分类号:  (Pressure treatment)

  • 81.40.Vw
75.50.Lk (Spin glasses and other random magnets) 75.30.Et (Exchange and superexchange interactions) 75.30.Gw (Magnetic anisotropy)