Electrical Spin State Manipulation in All‐Magnet Heterojunctions Using a Ferromagnetic Spin Source

IF 27.4 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Hang Xie, Zhiqiang Mu, Yuxin Si, Jiaqi Wang, Xiangrong Wang, Yihong Wu
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引用次数: 0

Abstract

The ability to electrically manipulate spin states in magnetic materials is essential for the advancement of energy‐efficient spintronic device, which is typically achieved in systems composed of a spin source and a magnetic target, where the magnetic state of the target is altered by a charge current. While theories suggest that ferromagnets could function as more versatile spin sources, direct experimental studies involving only the spin source and target layers have been lacking. Here electrical manipulation of spin states in noncolinear antiferromagnet Mn3Sn using ferromagnets (Ni, Fe, NiFe, CoFeB) as the spin sources is reported. Both field‐free switching and switching with an assistive field are achieved in Mn3Sn/ferromagnet bilayers, where the switching polarity correlates with the sign of anomalous Hall effect of the ferromagnets. The experimental findings can be accounted for by the presence of spin currents arising from spin‐dependent scattering within the ferromagnets. This finding provides valuable insights into the underlying mechanisms of spin‐conversion in ferromagnets, offering an alternative spin source for novel technological applications.

Abstract Image

电操纵磁性材料中自旋态的能力对于高能效自旋电子器件的发展至关重要,这种能力通常在由自旋源和磁性目标组成的系统中实现,目标的磁性状态由电荷电流改变。虽然理论认为铁磁体可以作为更多功能的自旋源,但一直缺乏只涉及自旋源和磁靶层的直接实验研究。本文报道了使用铁磁体(镍、铁、镍铁合金、钴铁合金)作为自旋源对非线性反铁磁体 Mn3Sn 中的自旋态进行电操纵的情况。在 Mn3Sn/铁磁体双层膜中实现了无磁场切换和辅助磁场切换,切换极性与铁磁体的反常霍尔效应符号相关。实验结果可以用铁磁体内部自旋散射产生的自旋电流来解释。这一发现为了解铁磁体自旋转换的基本机制提供了宝贵的见解,为新型技术应用提供了另一种自旋源。
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来源期刊
Advanced Materials
Advanced Materials 工程技术-材料科学:综合
CiteScore
43.00
自引率
4.10%
发文量
2182
审稿时长
2 months
期刊介绍: Advanced Materials, one of the world's most prestigious journals and the foundation of the Advanced portfolio, is the home of choice for best-in-class materials science for more than 30 years. Following this fast-growing and interdisciplinary field, we are considering and publishing the most important discoveries on any and all materials from materials scientists, chemists, physicists, engineers as well as health and life scientists and bringing you the latest results and trends in modern materials-related research every week.
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