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Title: Interface-driven spin-torque ferromagnetic resonance by Rashba coupling at the interface between nonmagnetic materials

Journal Article · · Physical Review B
 [1];  [1];  [2];  [1];  [1];  [3];  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States); Northwestern Univ., Evanston, IL (United States)
  3. Northwestern Univ., Evanston, IL (United States)

The Rashba-Edelstein effect stems from the interaction between the electron's spin and its momentum induced by spin-orbit interaction at an interface or a surface. It was shown that the inverse Rashba-Edelstein effect can be used to convert a spin current into a charge current. Here, we demonstrate the reverse process of a charge-to spin-current conversion at a Bi/Ag Rashba interface. We show that this interface-driven spin current can drive an adjacent ferromagnet to resonance. We employ a spin-torque ferromagnetic resonance excitation/detection scheme which was developed originally for a bulk spin-orbital effect, the spin Hall effect. In our experiment, the direct Rashba-Edelstein effect generates an oscillating spin current from an alternating charge current driving the magnetization precession in a neighboring permalloy (Py, Ni80Fe20) layer. As a result, electrical detection of the magnetization dynamics is achieved by a rectificationmechanism of the time dependent multilayer resistance arising from the anisotropic magnetoresistance.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Materials Sciences and Engineering Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1352517
Alternate ID(s):
OSTI ID: 1258314
Journal Information:
Physical Review B, Vol. 93, Issue 22; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 56 works
Citation information provided by
Web of Science

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Cited By (12)

Effect of Inserting a Transition Metal Cu Layer on the Spin‐Orbit Torque‐Induced Magnetization Switching in Pt/Co/Ta Structures journal May 2019
Spin–torque generator engineered by natural oxidation of Cu journal October 2016
Perspective: Interface generation of spin-orbit torques journal November 2016
FMR-related phenomena in spintronic devices journal June 2018
Pure spin currents in magnetically ordered insulator/normal metal heterostructures journal July 2018
Spin–orbit torques in GaN/NiFe bilayers journal October 2018
Evaluation of bulk-interface contributions to Edelstein magnetoresistance at metal/oxide interfaces journal October 2017
Rashba-Edelstein Magnetoresistance in Metallic Heterostructure text January 2016
Evaluation of bulk-interface contributions to Edelstein magnetoresistance at metal/oxide interfaces text January 2017
High frequency dynamics modulated by collective magnetization reversal in artificial spin ice text January 2017
Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems text January 2018
FMR-related phenomena in spintronic devices text January 2018

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