Publication Date:
2017-12-22
Description:
Author(s): K. S. Das, W. Y. Schoemaker, B. J. van Wees, and I. J. Vera-Marun Electrical injection of spin current via the spin Hall effect has a huge technological implication for spin transfer torque devices and in magnon spintronics. This effect generates a spin current perpendicular to a charge current but has so far relied on expensive heavy metals. This paper uncovers a new mechanism present in ferromagnets, the anomalous spin Hall effect, where the magnetization of the ferromagnet is used to tune the spin injection efficiency up to a level greater than that found in heavy metals. The authors demonstrate this anomalous mechanism via an experimental advance where nonlocal magnon transport in a ferrimagnetic insulator (YIG) was achieved using a ferromagnetic metal (permalloy) for efficient and tunable electrical injection and detection of magnons. [Phys. Rev. B 96, 220408(R)] Published Thu Dec 21, 2017
Keywords:
Magnetism
Print ISSN:
1098-0121
Electronic ISSN:
1095-3795
Topics:
Physics
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