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Updated: Jan 20, 2026

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磁晶异质性使得在Tm₃Fe₅O₁₂/Pt中实现无场的确定性切换

Shanshan Hu^1,2, Junya Huang², Cuixiu Zheng²

¹Key Laboratory of Micro and Nano Photonic Structures (MOE), College of Future Information Technology, Fudan University, Shanghai 200433, China.

ACS applied materials & interfaces

|January 19, 2026

概括

在TmIG/Pt双层中的内在立方磁晶异质性使得无磁场的磁化切换成为可能. 这种以对称性驱动的机制是开发可扩展,节能的自旋电子存储器和太赫兹设备的关键.

科学领域:

这就是Spintronics.
材料科学材料科学材料科学
凝聚物质物理学凝聚物质物理学

背景情况:

可扩展和节能的旋转式内存需要确定性,无磁场的磁化开关.
现有的方法在实现可靠的控制方面面临挑战.

研究的目的:

揭示Tm3Fe5O12 (TmIG) /Pt双层中三重旋转和镜子 (3m) 对称切换的微观机制.
建立基于对称的设计原则,用于铁磁自旋电子设备.

主要方法:

使用了原子自旋动力学模拟.
研究了以点 (111) 为导向的TmIG/Pt双层.
对Y3Fe5O12 (YIG) 进行了比较模拟.

主要成果:

TmIG的内在立方磁晶异形性 (MCA) 打破了镜面对称性,使得3米对称的扭矩可以在无场转换.
切换显示出强大的角选择性和在巨大的旋转轨道扭矩下类似切换的行为.
由MCA驱动的无场切换是稀土铁石榴石的普遍特征.

结论:

通过MCA打破对称性是确定性,无磁场磁化切换的可行途径.
这项研究为超快,低功耗的自旋电子存储器和太赫兹自旋电子提供了设计原则.

关键词:

原子旋转动态模拟的原子旋转动态模拟.铁磁自旋电子装置是铁磁自旋磁装置.无磁场的磁性切换开关.磁体晶体异性质的异性质是什么旋转轨道扭矩扭矩

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