铂、锰和 Pt0.5Mn0.5 中自旋和轨道产生的自旋轨道力矩

IF 2.4 4区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Current Applied Physics Pub Date : 2024-08-23 DOI:10.1016/j.cap.2024.08.012

Sumin Kim, Gyung-Min Choi

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引用次数: 0

摘要

强自旋轨道耦合系统中的自旋生成导致了巨大的自旋轨道力矩。最近，弱自旋轨道耦合系统中的轨道生成也有报道。在本研究中，我们研究了非磁体/铁磁体双层材料的自旋轨道转矩，其中非磁体为 Pt、Mn 和 Pt0.5Mn0.5 合金，铁磁体为 Fe、Co 和 Ni。Pt0.5Mn0.5/Ni 结构的 SOT 效率（即自旋霍尔角）最高，达到 0.32，是 Pt/Ni 结构的 0.1 的三倍。关于 SOT 机制，我们讨论了 PtMn 合金中增强的轨道或自旋生成。

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Spin-orbit torque with spin and orbital generation in Pt, Mn, and Pt0.5Mn0.5

The spin generation in strong spin-orbit coupling systems has led to a large spin-orbit torque. Recently, the orbital generation in weak spin-orbit coupling systems was reported. In this study, we investigate the spin-orbit torque of a nonmagnet/ferromagnet bilayer, where the nonmagnet is Pt, Mn, and Pt_0.5Mn_0.5 alloy, and the ferromagnet is Fe, Co, and Ni. The highest SOT efficiency, i.e., the spin Hall angle, of 0.32 was achieved with the Pt_0.5Mn_0.5/Ni structure, which is three times larger than 0.1 with the Pt/Ni structure. For the SOT mechanism, we discuss the enhanced orbital or spin generation in the PtMn alloy.

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来源期刊

Current Applied Physics 物理-材料科学：综合

CiteScore

4.80

自引率

0.00%

发文量

213

审稿时长

33 days

期刊介绍： Current Applied Physics (Curr. Appl. Phys.) is a monthly published international journal covering all the fields of applied science investigating the physics of the advanced materials for future applications. Other areas covered: Experimental and theoretical aspects of advanced materials and devices dealing with synthesis or structural chemistry, physical and electronic properties, photonics, engineering applications, and uniquely pertinent measurement or analytical techniques. Current Applied Physics, published since 2001, covers physics, chemistry and materials science, including bio-materials, with their engineering aspects. It is a truly interdisciplinary journal opening a forum for scientists of all related fields, a unique point of the journal discriminating it from other worldwide and/or Pacific Rim applied physics journals. Regular research papers, letters and review articles with contents meeting the scope of the journal will be considered for publication after peer review. The Journal is owned by the Korean Physical Society.