自旋电子学
石墨烯
凝聚态物理
铁磁性
自旋极化
材料科学
范德瓦尔斯力
旋转阀
异质结
旋转泵
密度泛函理论
居里温度
自旋工程
纳米技术
光电子学
自旋霍尔效应
物理
磁场
磁电阻
量子力学
电子
分子
作者
Bing Zhao,Roselle Ngaloy,Sukanya Ghosh,Soheil Ershadrad,Rahul Gupta,Khadiza Ali,Anamul Md Hoque,Bogdan Karpiak,Dmitrii Khokhriakov,Craig Polley,T. Balasubramanian,Alexei Kalaboukhov,Peter Svedlindh,Biplab Sanyal,Saroj P. Dash
标识
DOI:10.1002/adma.202209113
摘要
Abstract The discovery of van der Waals (vdW) magnets opened a new paradigm for condensed matter physics and spintronic technologies. However, the operations of active spintronic devices with vdW ferromagnets are limited to cryogenic temperatures, inhibiting their broader practical applications. Here, the robust room‐temperature operation of lateral spin‐valve devices using the vdW itinerant ferromagnet Fe 5 GeTe 2 in heterostructures with graphene is demonstrated. The room‐temperature spintronic properties of Fe 5 GeTe 2 are measured at the interface with graphene with a negative spin polarization. Lateral spin‐valve and spin‐precession measurements provide unique insights by probing the Fe 5 GeTe 2 /graphene interface spintronic properties via spin‐dynamics measurements, revealing multidirectional spin polarization. Density functional theory calculations in conjunction with Monte Carlo simulations reveal significantly canted Fe magnetic moments in Fe 5 GeTe 2 along with the presence of negative spin polarization at the Fe 5 GeTe 2 /graphene interface. These findings open opportunities for vdW interface design and applications of vdW‐magnet‐based spintronic devices at ambient temperatures.
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