Antiferromagnetic domain wall dynamics in magnetoelectric MnTiO3 studied by optical imaging
Antiferromagnetic domain wall dynamics in magnetoelectric MnTiO3 studied by optical imaging
复制标题
通过光学成像研究磁电 MnTiO3 中的反铁磁畴壁动力学
DOI：
10.1103/physrevb.105.094417
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发表时间：
2022
影响因子：
3.7
通讯作者：
T. Arima
中科院分区：
文献类型：
--
作者：
T. Sato;N. Abe;Y. Tokunaga;T. Arima
利用光学磁手征成像技术研究了共线反铁磁体中反铁磁畴壁的动力学。反相畴是通过利用两个不同的反铁磁态之间的吸收系数的不对称性与相反方向的Néel矢量清晰地可视化。利用多种磁多极子共存的特点，在对磁畴图案成像的同时，通过沿着入射光传播方向施加纵向直流电场和磁场，实现了反铁磁态的切换。记忆效应使毫秒动力学与域反转的成像。详细研究了畴壁随温度和外场强度变化的运动，揭示了热效应对畴壁迁移率的影响。
We study the dynamics of the antiferromagnetic domain wall in collinear antiferromagnetby means of optical magnetochiral imaging. Antiphase domains are clearly visualized by exploiting the asymmetry in absorption coefficients between two distinct antiferromagnetic states with Néel vectors in opposite directions. Utilizing the coexistence of several types of magnetic multipoles, antiferromagnetic states inare switched by longitudinal DC electric and magnetic fields applied along the propagation direction of incident light while imaging the domain pattern. The memory effect enables the imaging of millisecond dynamics with domain inversion. Detailed investigation of the domain-wall motion with varying temperature and external-field strength reveals the thermal effects on the mobility of the domain wall.