Laser melting and quenching effects on magnetic domains in quasi-two-dimensional ferromagnetic Cr5Te8 crystal
Laser melting and quenching effects on magnetic domains in quasi-two-dimensional ferromagnetic Cr5Te8 crystal
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DOI：
10.1063/5.0035824
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发表时间：
2020-12
影响因子：
4
通讯作者：
Miao Li;Zongwei Ma;Jian‐Min Yan;Caixing Liu;Xuan Luo;Yuping Sun;Qiangchun Liu;Z. Sheng
中科院分区：
文献类型：
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作者：
Miao Li;Zongwei Ma;Jian‐Min Yan;Caixing Liu;Xuan Luo;Yuping Sun;Qiangchun Liu;Z. Sheng
利用磁光显微镜结合极性磁光克尔效应（MOKE）技术，研究了准二维（准2D）铁磁Cr 5 Te 8晶体中磁畴的光致熔化和猝灭效应.在临界激光功率密度（2.55 × 108 mW/cm ~ 2）下，脉冲激光辐照Cr 5 Te 8晶体可使磁畴熔化，MOKE图像和曲线均证实了这一点。此外，有趣的是，发现在激光熔化和淬火后，Cr 5 Te 8晶体的树枝状畴被破坏，并且重新生长的球形畴与原始树枝状晶分离。同时，作为外场的函数的磁化行为被调制。这些结果表明，激光熔化和淬火是一种有效的技术，以定制的磁畴准二维磁铁，它提供了一个可行的路线，在创建光学自旋电子器件。
By utilizing magneto-optical microscopy combined with the polar magneto-optical Kerr effect (MOKE) techniques, the photo-induced melting and quenching effects on magnetic domains in a quasi-two-dimensional (quasi-2D) ferromagnetic Cr5Te8 crystal were investigated. With irradiation of a pulsed laser, the magnetic domain of the Cr5Te8 crystal can be melted at a critical laser power density (2.55 × 108 mW/cm2), which has been confirmed by both MOKE images and curves. Moreover, it is intriguing to find that after laser melting and quenching, the dendritic type domains of the Cr5Te8 crystal are broken and the regrown spherical type domains are isolated from the original dendrites. Simultaneously, the magnetization behavior as a function of external field was modulated. These findings suggest that laser melting and quenching is an effective technique to tailor the magnetic domains in quasi-2D magnets and it provides a viable route in the creation of optical spintronic devices.