1. Spin glassy behavior and large exchange bias effect in cubic perovskite Ba0.8Sr0.2FeO3-δ.
- Author
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Yu-Xuan Liu, Zhe-Hong Liu, Xu-Bin Ye, Xu-Dong Shen, Xiao Wang, Bo-Wen Zhou, Guang-Hui Zhou, and You-Wen Long
- Subjects
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FERRIC oxide , *IRON oxides , *DISCRIMINATION (Sociology) , *EXCHANGE , *BEHAVIOR , *OXYGEN - 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. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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