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纳米尺度量子成像无场决定性切换的奇拉尔反铁磁铁的量子成像

Jingcheng Zhou¹, Senlei Li¹, Chuangtang Wang²

¹Georgia Institute of Technology, School of Physics, Atlanta, Georgia 30332, USA.

Physical review letters

|December 12, 2025

概括

研究人员使用来自WTe2.2的自旋轨道扭矩在Mn3Sn中实现了无场确定性磁化切换. 这一突破使得可扩展的,节能的自旋电子设备可以在没有外部磁场的情况下使用.

科学领域:

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

背景情况:

非传统的旋转轨道扭矩 (SOT) 为先进的旋转电子提供可调的旋转生成.
无磁场确定性磁化切换对于可扩展和节能磁记录至关重要.

研究的目的:

为了将无磁场磁化切换策略扩展到奇拉反铁磁体.
调查使用范德瓦尔斯材料WTe2作为Mn3Sn中SOT的自旋源.

主要方法:

在Mn3Sn.中模拟SOT效应的数值计算.
使用自旋电流与外平面倾斜的极化从WTe2.
使用扫描量子显微镜观察纳米级磁域进化.

主要成果:

阻尼式SOT驱动着奇拉磁顺序旋转;场式SOT提供了确定性切换.
在Mn3Sn.中证明了成功的无场决定性磁化切换.
实现了高达90%的非常大的磁切换比率.

结论:

混合SOT平台结合非线性反铁磁体和VDW旋转源是有希望的.
这种方法有助于开发下一代自旋电子逻辑设备.
突出了新型磁化控制在自旋电子学中的潜力.

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