Direct Evidence of Simultaneous Reversal of Ferrimagnetically Coupled Sm 4f and Mn 3d Angular Momenta in SmMnO3
Direct Evidence of Simultaneous Reversal of Ferrimagnetically Coupled Sm 4f and Mn 3d Angular Momenta in SmMnO3
复制标题
DOI：
10.3938/jkps.76.904
复制
发表时间：
2020-05
影响因子：
0.6
通讯作者：
J.-S. Jung;T. Nakamura;Y. Wakabayashi;T. Kimura
中科院分区：
文献类型：
--
作者：
J.-S. Jung;T. Nakamura;Y. Wakabayashi;T. Kimura
利用软X射线磁性圆二色性（XMCD）技术，研究了在补偿温度（Tcomp = 9.4K）附近表现出明显磁电容效应的Néel N型亚铁磁体SmMnO 3中Sm 4f和Mn 3d磁矩的磁状态.的XMCD结果表明，Sm 4f和Mn 3d的时刻总是相互反平行排列，并在扫描磁场时，Sm 4f和Mn 3d的角动量被同时反转的磁场中观察到的磁电容效应。这表明SmMnO 3的磁电容效应是由Sm 4f和Mn 3d角动量的同时反转引起的，即，磁化反转我们讨论了一个合理的起源的p-d杂化机制的磁电容效应。
Using the soft X-ray magnetic circular dichroism (XMCD) technique, we investigated the magnetic states of the Sm 4f and the Mn 3d moments in a Néel N-type ferrimagnet, SmMnO3, which exhibits a striking magnetocapacitive effect around the compensation temperature (Tcomp ≈ 9.4 K). The XMCD results show that the Sm 4f and the Mn 3d moments were always aligned antiparallel to each other and that, upon sweeping a magnetic field, the angular momenta of Sm 4f and Mn 3d were simultaneously reversed at the field where the magnetocapacitive effect was observed. This indicates that the magnetocapacitive effect of SmMnO3 is induced by a simultaneous reversal of Sm 4f and Mn 3d angular momenta, i.e., magnetization reversal. We discuss a plausible origin of the magnetocapacitive effect in terms of the p-d hybridization mechanism.