Spin injection and detection via the anomalous spin Hall effect of a ferromagnetic metal

We report a spin injection and detection mechanism via the anomalous Hall effect in a ferromagnetic metal. The anomalous spin Hall effect (ASHE) refers to the transverse spin current generated within the ferromagnet. We utilize the ASHE and its reciprocal effect to electrically inject and detect mag...

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Bibliographic Details
Published in:Physical review. B 2017-12, Vol.96 (22), Article 220408
Main Authors: Das, K. S., Schoemaker, W. Y., van Wees, B. J., Vera-Marun, I. J.
Format: Article
Language:English
Subjects:
Electromagnetism
Ferromagnetism
Ferrous alloys
Hall effect
Magnetic alloys
Magnetism
Magnons
Platinum
Spintronics
Yttrium
Yttrium-iron garnet
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Summary:We report a spin injection and detection mechanism via the anomalous Hall effect in a ferromagnetic metal. The anomalous spin Hall effect (ASHE) refers to the transverse spin current generated within the ferromagnet. We utilize the ASHE and its reciprocal effect to electrically inject and detect magnons in a magnetic insulator (yttrium iron garnet) in a nonlocal geometry. Our experiments reveal that permalloy has a comparable spin injection and detection efficiency to that of platinum, owing to the ASHE. We also demonstrate the tunability of the ASHE via the orientation of the permalloy magnetization, thus creating possibilities for spintronic applications.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.96.220408