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Title: Temperature dependence of spin-orbit torques in W/CoFeB bilayers

Abstract

We report on the temperature variation of spin-orbit torques in perpendicularly magnetized W/CoFeB bilayers. Harmonic Hall voltage measurements in perpendicularly magnetized CoFeB reveal increased longitudinal and transverse effective magnetic field components at low temperatures. The damping-like spin-orbit torque reaches an efficiency of 0.55 at 19 K. Scanning transmission electron microscopy and X-ray reflectivity measurements indicate that considerable interface mixing between W and CoFeB may be responsible for strong spin-orbit interactions.

Authors:
; ; ; ;  [1]; ;  [2]; ; ;  [3]
  1. AGH University of Science and Technology, Department of Electronics, Al. Mickiewicza 30, 30-059 Kraków (Poland)
  2. NanoSpin, Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, FI-00076 Aalto (Finland)
  3. Spintronics Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568 (Japan)
Publication Date:
OSTI Identifier:
22594311
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 109; Journal Issue: 6; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COBALT BORIDES; EFFICIENCY; ELECTRIC POTENTIAL; INTERFACES; IRON BORIDES; LAYERS; L-S COUPLING; MAGNETIC FIELDS; MIXING; REFLECTIVITY; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0065-0273 K; TORQUE; TRANSMISSION ELECTRON MICROSCOPY; TUNGSTEN BORIDES; X RADIATION

Citation Formats

Skowroński, Witold, E-mail: skowron@agh.edu.pl, Cecot, Monika, Kanak, Jarosław, Ziętek, Sławomir, Stobiecki, Tomasz, Yao, Lide, Dijken, Sebastiaan van, Nozaki, Takayuki, Yakushiji, Kay, and Yuasa, Shinji. Temperature dependence of spin-orbit torques in W/CoFeB bilayers. United States: N. p., 2016. Web. doi:10.1063/1.4960793.
Skowroński, Witold, E-mail: skowron@agh.edu.pl, Cecot, Monika, Kanak, Jarosław, Ziętek, Sławomir, Stobiecki, Tomasz, Yao, Lide, Dijken, Sebastiaan van, Nozaki, Takayuki, Yakushiji, Kay, & Yuasa, Shinji. Temperature dependence of spin-orbit torques in W/CoFeB bilayers. United States. doi:10.1063/1.4960793.
Skowroński, Witold, E-mail: skowron@agh.edu.pl, Cecot, Monika, Kanak, Jarosław, Ziętek, Sławomir, Stobiecki, Tomasz, Yao, Lide, Dijken, Sebastiaan van, Nozaki, Takayuki, Yakushiji, Kay, and Yuasa, Shinji. Mon . "Temperature dependence of spin-orbit torques in W/CoFeB bilayers". United States. doi:10.1063/1.4960793.
@article{osti_22594311,
title = {Temperature dependence of spin-orbit torques in W/CoFeB bilayers},
author = {Skowroński, Witold, E-mail: skowron@agh.edu.pl and Cecot, Monika and Kanak, Jarosław and Ziętek, Sławomir and Stobiecki, Tomasz and Yao, Lide and Dijken, Sebastiaan van and Nozaki, Takayuki and Yakushiji, Kay and Yuasa, Shinji},
abstractNote = {We report on the temperature variation of spin-orbit torques in perpendicularly magnetized W/CoFeB bilayers. Harmonic Hall voltage measurements in perpendicularly magnetized CoFeB reveal increased longitudinal and transverse effective magnetic field components at low temperatures. The damping-like spin-orbit torque reaches an efficiency of 0.55 at 19 K. Scanning transmission electron microscopy and X-ray reflectivity measurements indicate that considerable interface mixing between W and CoFeB may be responsible for strong spin-orbit interactions.},
doi = {10.1063/1.4960793},
journal = {Applied Physics Letters},
number = 6,
volume = 109,
place = {United States},
year = {Mon Aug 08 00:00:00 EDT 2016},
month = {Mon Aug 08 00:00:00 EDT 2016}
}