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在矿薄膜中对磁域结构的光控制,使用线性极化秒激光脉冲

JianChao Meng^1,2, HaiLun Du¹, BoRong Cong¹

¹School of Physics and Astronomy, Beijing Normal University, Beijing 100875, People's Republic of China.

|March 12, 2026

概括

研究人员使用低能激光脉冲实现了磁域壁 (DWs) 的超快控制. 这种非热的光磁效应使先进的光学器件能够高效地进行光学操纵.

科学领域:

这就是Spintronics.
光学是什么?光学是什么?光学是什么?
材料科学材料科学材料科学

背景情况:

具有低能耗的超快速旋转控制对旋转电子非常重要.
开发用于磁域壁 (DW) 操纵的高效方法是一个活跃的研究领域.

研究的目的:

为了研究使用线性极化女秒 (LPF) 激光脉冲对磁域墙壁图案的非热操纵.
与现有方法相比,确定LPF驱动的DW运动的能效.
探索这种光磁效应的潜在机制和潜在应用.

主要方法:

使用LPF激光脉冲照明La$_{0.67}$Sr$_{0.33}$MnO$_{3}$ (LSMO) 薄膜.
测量相对于激光偏振的DW运动方向.
确定DW运动的体积能量密度值.
超快速光谱和偏振依赖测量.
实现DW异型电阻的全光控制.

主要成果:

在LSMO薄膜中的DW被驱动为垂直于LPF方向移动.
发现LPF驱动的DW运动的能量密度值低至57J/cm$^3$,远低于电流方法.
超快光谱和偏振依赖性证实LPF驱动的DW转换模式的激发是机制.
成功地证明了DW异型电阻效应的全光学控制.

结论:

LPF激光照明提供了一种高效的,非热方法来操纵磁性DWs.
观测到的光磁效应为开发高速,低能耗的光脊柱电子设备提供了途径.
这项研究促进了对自旋电子系统中光学控制的理解.

关键词:

线性偏振的女性秒激光器磁域墙壁磁域墙壁磁域墙壁金矿的薄膜是一种薄膜.这是光磁效应.旋转电子技术 (spintronics) 是一个技术.

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