在BiYIG薄膜中观察和控制状旋
Jinlong Wang1,2, Hanchen Wang3, Zhewen Xu4
1Beihang University, Fert Beijing Institute, MIIT Key Laboratory of Spintronics, School of Integrated Circuit Science and Engineering, Beijing 100191, China.
Physical review letters
|August 27, 2025
概括
研究人员在替代石的伊铁石中引入了旋挫折来控制磁性状态. 马格农旋转扭矩使这些挫折的旋转状态的单向切换成为可能,为节能旋转器件铺平了道路.
科学领域:
- 凝聚物质物理学
- 材料科学
- 机器人
背景情况:
- 磁层中的奇拉相互作用稳定非线性旋转纹理,对于设计具有可控制磁化动态的设备至关重要.
- 传统的对磁性的挫折会造成几何限制,限制了设备设计的可能性.
研究的目的:
- 介绍并研究"奇拉旋转挫折"现象,其中退化的磁态抵消了Dzyaloshinskii-Moriya相互作用.
- 通过在双替代的铁石榴石薄膜中使用磁子来证明这些性挫折的旋转状态的操纵.
主要方法:
- 使用扫描空磁度测量来识别和描述磁状态.
- 使用旋转技术来研究旋转扭矩效应.
- 研究了已识别的性挫折旋转状态的磁力驱动切换.
主要成果:
- 确定了四种能量退化性旋转丧状态,其特点是内平面的宏观旋转与两个对立的外平面旋转.
- 通过使用马格农旋转矩实现了这些状态的可控切换.
- 证明切换过程是单向的,它的选择性取决于传入的磁铁方向.
结论:
- 奇拉旋转挫折提供了一个新的机制来操纵磁性状态,克服传统挫折的几何约束.
- 马格农驱动的切换提供了一种强大而有选择的方法来控制挫折的旋转状态.
- 这种方法为挫败的磁力和节能旋转器件的开发开辟了新的途径.
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