Manipulation of Ferromagnetic domain by the terahertz free electron laser excitation
Manipulation of Ferromagnetic domain by the terahertz free electron laser excitation
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DOI：
10.1109/irmmw-thz46771.2020.9370573
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
M. Nakajima;T. Kurihara;T. Shimizu;Y. Koike;G. Isoyama
中科院分区：
文献类型：
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作者：
M. Nakajima;T. Kurihara;T. Shimizu;Y. Koike;G. Isoyama
通过太赫兹自由电子激光的激发，实现了对掺铒铁氧体的铁磁区控制。由法拉第显微镜监测的磁畴结构，在靠近磁畴边缘的高强度太赫兹脉冲的照射下发生永久变化。讨论了磁畴结构变化的机理，并结合脱钉效应和激发产生的熵力对其进行了解释。
We performed ferromagnetic domain control in Erbium orthoferrite by excitation of the terahertz free electron laser. The magnetic domain structure, which was monitored by faraday microscopy, changes permanently by the irradiation of high-intensity terahertz pulses near the domain edges. The mechanism of the change of the magnetic domain structure was discussed and explained by the combination of the depinning effect and the entropic force induced by the excitation.