Interfacial Dzyaloshinskii-Moriya interaction and dampinglike spin-orbit torque in [Co/Gd/Pt]N magnetic multilayers
Interfacial Dzyaloshinskii-Moriya interaction and dampinglike spin-orbit torque in [Co/Gd/Pt]N magnetic multilayers
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[Co/Gd/Pt]N 磁性多层膜中的界面 Dzyaloshinskii-Moriya 相互作用和类阻尼自旋轨道扭矩
DOI：
10.1103/physrevb.103.104409
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发表时间：
2021
影响因子：
3.7
通讯作者：
Teruo Ono
中科院分区：
文献类型：
--
作者：
Tomoe Nishimura;Dae-Yun Kim;Duck-Ho Kim;Yune-Seok Nam;Yong-Keun Park;Nam-Hui Kim;Yoichi Shiota,Chun-Yeol You;Byoung-Chul Min;Sug-Bong Choe;Teruo Ono
近年来，磁性多层体系因其适于产生磁性手性自旋结构而再次受到人们的重视。本研究通过实验研究了Co/Gd/Pt磁性多层膜的Dzyaloshisnkii-Moriaya相互作用（DMI）和自旋-霍尔角（SHA）与多层膜重复次数的关系。DMI和SHA分别是决定同手性自旋结构稳定性和迁移率的重要变量。实验结果表明，DMI与畴壁偶极子能之比随着畴壁偶极子能的增加而逐渐减小，在较大的情况下难以实现同手性自旋结构；观察到的SHA不变性表明，重复的铂层对SHA的影响可以忽略不计。
Recently, magnetic multilayer systems have received again a great attention owing to their suitability for the generation of magnetic chiral spin structure. In this study, we experimentally investigated the interfacial Dzyaloshisnkii-Moriaya interaction (DMI) and the spin-Hall angle (SHA) of magnetic Co/Gd/Pt multilayers with respect to the repetition numberof the multilayers. The DMI and SHA are important variables that govern the stability and mobility of a homochiral spin structure, respectively. The experimental results show that the ratio between the DMI and the dipole energy from the domain wall gradually decreases asincreases, which is expected to be hard to achieve homochiral spin structure for largerand the values of SHA remain constant irrespective of. The observed SHA invariance indicates that the Pt layers in repetition have a negligible effect on the SHA.