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

Abstract

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.

Authors:
 [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)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Materials Sciences and Engineering Division
OSTI Identifier:
1352517
Alternate Identifier(s):
OSTI ID: 1258314
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 93; Journal Issue: 22; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Jungfleisch, M. B., Zhang, W., Sklenar, J., Jiang, W., Pearson, J. E., Ketterson, J. B., and Hoffmann, A. Interface-driven spin-torque ferromagnetic resonance by Rashba coupling at the interface between nonmagnetic materials. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.93.224419.
Jungfleisch, M. B., Zhang, W., Sklenar, J., Jiang, W., Pearson, J. E., Ketterson, J. B., & Hoffmann, A. Interface-driven spin-torque ferromagnetic resonance by Rashba coupling at the interface between nonmagnetic materials. United States. https://doi.org/10.1103/PhysRevB.93.224419
Jungfleisch, M. B., Zhang, W., Sklenar, J., Jiang, W., Pearson, J. E., Ketterson, J. B., and Hoffmann, A. Mon . "Interface-driven spin-torque ferromagnetic resonance by Rashba coupling at the interface between nonmagnetic materials". United States. https://doi.org/10.1103/PhysRevB.93.224419. https://www.osti.gov/servlets/purl/1352517.
@article{osti_1352517,
title = {Interface-driven spin-torque ferromagnetic resonance by Rashba coupling at the interface between nonmagnetic materials},
author = {Jungfleisch, M. B. and Zhang, W. and Sklenar, J. and Jiang, W. and Pearson, J. E. and Ketterson, J. B. and Hoffmann, A.},
abstractNote = {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.},
doi = {10.1103/PhysRevB.93.224419},
journal = {Physical Review B},
number = 22,
volume = 93,
place = {United States},
year = {2016},
month = {6}
}

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Cited by: 8 works
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Works referencing / citing this record:

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