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Title: Large spin-orbit torques in Pt/Co-Ni/W heterostructures

Abstract

The spin orbit torques (SOTs) in perpendicularly magnetized Co-Ni multilayers sandwiched between two heavy metals (HM) have been studied. By exploring various HM materials, we show an efficient enhancement or cancellation of the total SOT, depending on the combination of the two HM materials. The maximum SOT effective field is obtained in Pt/Co-Ni/W heterostructures. We also model our double HM system and show that the effective spin Hall angle has a peak value at certain HM thicknesses. Measuring the SOT in Pt/Co-Ni/W for various W thicknesses confirms an effective spin Hall angle up to 0.45 in our double HM system.

Authors:
; ; ;  [1]
  1. Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576 (Singapore)
Publication Date:
OSTI Identifier:
22594441
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 109; Journal Issue: 4; 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; HEAVY METALS; LAYERS; NICKEL; ORBITS; PEAKS; PLATINUM; SPIN; THICKNESS; TORQUE

Citation Formats

Yu, Jiawei, Qiu, Xuepeng, Legrand, William, and Yang, Hyunsoo, E-mail: eleyang@nus.edu.sg. Large spin-orbit torques in Pt/Co-Ni/W heterostructures. United States: N. p., 2016. Web. doi:10.1063/1.4959958.
Yu, Jiawei, Qiu, Xuepeng, Legrand, William, & Yang, Hyunsoo, E-mail: eleyang@nus.edu.sg. Large spin-orbit torques in Pt/Co-Ni/W heterostructures. United States. doi:10.1063/1.4959958.
Yu, Jiawei, Qiu, Xuepeng, Legrand, William, and Yang, Hyunsoo, E-mail: eleyang@nus.edu.sg. Mon . "Large spin-orbit torques in Pt/Co-Ni/W heterostructures". United States. doi:10.1063/1.4959958.
@article{osti_22594441,
title = {Large spin-orbit torques in Pt/Co-Ni/W heterostructures},
author = {Yu, Jiawei and Qiu, Xuepeng and Legrand, William and Yang, Hyunsoo, E-mail: eleyang@nus.edu.sg},
abstractNote = {The spin orbit torques (SOTs) in perpendicularly magnetized Co-Ni multilayers sandwiched between two heavy metals (HM) have been studied. By exploring various HM materials, we show an efficient enhancement or cancellation of the total SOT, depending on the combination of the two HM materials. The maximum SOT effective field is obtained in Pt/Co-Ni/W heterostructures. We also model our double HM system and show that the effective spin Hall angle has a peak value at certain HM thicknesses. Measuring the SOT in Pt/Co-Ni/W for various W thicknesses confirms an effective spin Hall angle up to 0.45 in our double HM system.},
doi = {10.1063/1.4959958},
journal = {Applied Physics Letters},
number = 4,
volume = 109,
place = {United States},
year = {Mon Jul 25 00:00:00 EDT 2016},
month = {Mon Jul 25 00:00:00 EDT 2016}
}