无定形固体
霍尔效应
凝聚态物理
材料科学
微观结构
Berry连接和曲率
透射电子显微镜
电阻率和电导率
结晶学
纳米技术
物理
化学
冶金
几何相位
量子力学
作者
Peter Anand Sharma,Alfa Sharma,David Lidsky,Evan Schehrer,Katherine T. Young,Simeon Gilbert,Michael P. Siegal,Tzu‐Ming Lu
出处
期刊:APL Materials
[American Institute of Physics]
日期:2022-07-01
卷期号:10 (7)
摘要
The low temperature anomalous Hall effect in amorphous sputtered SmxCo1−x films is investigated. The microstructure and amorphous nature of the films were characterized by local area diffraction through transmission electron microscopy. The Sm/Co ratio was changed to elucidate the origin of the anomalous Hall effect, which is a proxy for spin polarized transport. The anomalous Hall effect obeys a scaling relation that points to an intrinsic Berry-curvature based mechanism, consistent with recent reports on other amorphous magnetic materials. The anomalous Hall angle increases with increasing Sm content and reaches large values of ∼1%. This observation is related to recent measurements of the local structure in amorphous Sm–Co alloys and suggests that rare earth elements can be utilized to improve electrical control over spin polarization in amorphous magnetic films.
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