Observation of gyromagnetic reversal
Observation of gyromagnetic reversal
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DOI：
10.1063/1.5041464
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发表时间：
2018-07-30
影响因子：
4
通讯作者：
Saitoh, Eiji
中科院分区：
文献类型：
--
作者：
Imai, Masaki;Ogata, Yudai;Saitoh, Eiji
利用巴内特效应测量技术，在低温下直接观测到亚铁磁绝缘体Ho_3Fe_5 O_（12）的旋磁反转，即旋磁比的符号变化。巴内特效应是一种现象，其中通过电子的旋转和总角动量J之间的耦合由机械旋转引起磁化。Ho 3Fe 5 O 12的机械旋转磁化在135 K和240 K时消失。这些温度分别对应于磁化补偿温度T-M和角动量补偿温度T-A。在T-M和T-A之间，由于旋磁比的符号变化，磁化翻转为与角动量平行。这项研究提供了一个前所未有的技术来探索旋磁性质。出版社：AIP Publishing
We report direct observation of gyromagnetic reversal, Which is the sign change of the gyromagnetic ratio in a ferrimagnet insulator Ho3Fe5O12, by using the Barnett effect measurement technique at low temperatures. The Barnett effect is a phenomenon in which magnetization is induced by mechanical rotation through the coupling between rotation and total angular momentum J of electrons. The magnetization of Ho3Fe5O12 induced by mechanical rotation disappears at 135 K and 240 K. The temperatures correspond to the magnetization compensation temperature T-M and the angular momentum compensation temperature T-A, respectively. Between T-M and T-A, the magnetization flips over to be parallel against the angular momentum due to the sign change of the gyromagnetic ratio. This study provides an unprecedented technique to explore the gyromagnetic properties. Published by AIP Publishing.