Giant interface spin-orbit torque in NiFe/Pt bilayers

doi:10.1088/1674-1056/ab9292

Abstract The current-induced spin-orbit torque (SOT) plays a dominant role to manipulate the magnetization in a heavy metal/ferromagnetic metal bilayer. We separate the contributions of interfacial and bulk spin-orbit coupling (SOC) to the effective field of field-like SOT in a typical NiFe/Pt bilayer by planar Hall effect (PHE). The effective field from interfacial SOC is directly measured at the transverse PHE configuration. Then, at the longitudinal configuration, the effective field from bulk SOC is determined, which is much smaller than that from interfacial SOC. The giant interface SOT in NiFe/Pt bilayers suggests that further analysis of interfacial effects on the current-induced manipulation of magnetization is necessary.

Keywords: spin-orbit coupling planar Hall effect spin-orbit torques spin Hall effect

Received: 20 April 2020
Revised: 11 May 2020
Accepted manuscript online:

PACS:	71.70.Ej	(Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)
	72.25.Ba	(Spin polarized transport in metals)
	75.76.+j	(Spin transport effects)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11574375).

Corresponding Authors: Tao Zhu
E-mail: tzhu@iphy.ac.cn

Cite this article:

Shu-Fa Li(李树发), Tao Zhu(朱涛) Giant interface spin-orbit torque in NiFe/Pt bilayers 2020 Chin. Phys. B 29 087102

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