钙钛矿结构RFeO3晶体的磁化跃迁效应研究进展

人工晶体学报 ›› 2021, Vol. 50 ›› Issue (8): 1575-1582.

钙钛矿结构RFeO₃晶体的磁化跃迁效应研究进展

贲鑫伟, 高湉, 翟浩天, 郑旭

上海电力大学数理学院,上海 201306

收稿日期:2021-03-02 出版日期:2021-08-15 发布日期:2021-09-14
通讯作者: 高湉,博士,教授。E-mail:gaotian@shiep.edu.cn
作者简介:贲鑫伟(1995—),男,江苏省人,硕士研究生。E-mail:76528921@qq.com

Research Progress on Magnetization Jump Effect of Perovskite RFeO₃ Crystals

BEN Xinwei, GAO Tian, ZHAI Haotian, ZHENG Xu

Department of Physics, Shanghai University of Electric Power, Shanghai 201306, China

Received:2021-03-02 Online:2021-08-15 Published:2021-09-14

摘要/Abstract

摘要： 钙钛矿稀土正铁氧体RFeO₃具有丰富的磁性,这主要源于4f电子层的稀土离子和3d电子层的铁离子之间复杂的相互作用。磁化跃迁作为RFeO₃体系中的重要现象,是指体系中的稀土离子磁矩和铁离子磁矩在特定的磁场和温度下发生180°旋转,宏观表现为磁热曲线中磁化强度发生断崖式变化。本文综述了不同化合物RFeO₃的两种磁化跃迁现象,第一类磁化跃迁通常具有补偿点,F_R与F_Fe的排列耦合方向不变,第二类磁化跃迁则相反,且两类磁化跃迁出现的温区受外加磁场的调控。

关键词: 稀土正铁氧体, 磁化跃迁, 磁各向异性, 自旋重取向

Abstract: Perovskite rare earth orthoferrites RFeO₃ possesses abundant magnetism, which is due to the complex interaction between rare earth ions in 4f electron shell and iron ions in 3d electron shell. As an important phenomenon in RFeO₃ system, magnetization jump means that the magnetic moments of rare earth ions and iron ions in the system rotate 180° under a specific temperature and applied magnetic field, and the macroscopic performance is that the magnetization changes abruptly in the magnetocaloric curve. In this paper, two kinds of magnetization jump phenomena of different compounds RFeO₃ are discussed, the first type of magnetization transition usually has compensation points, and the coupling direction of F_R and F_Fe is unchanged, while the second type of magnetization transition is opposite, and the temperature region of the two types of magnetization transition is regulated by the external magnetic field.

Key words: earth orthoferrite, magnetization jump, magnetocrystalline anisotropy, spin reorientation

中图分类号:

O73
O482

贲鑫伟, 高湉, 翟浩天, 郑旭. 钙钛矿结构RFeO₃晶体的磁化跃迁效应研究进展[J]. 人工晶体学报, 2021, 50(8): 1575-1582.

BEN Xinwei, GAO Tian, ZHAI Haotian, ZHENG Xu. Research Progress on Magnetization Jump Effect of Perovskite RFeO₃ Crystals[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(8): 1575-1582.

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钙钛矿结构RFeO₃晶体的磁化跃迁效应研究进展

Research Progress on Magnetization Jump Effect of Perovskite RFeO₃ Crystals

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