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Title: Engineering spin-orbit torque in Co/Pt multilayers with perpendicular magnetic anisotropy

To address thermal stability issues for spintronic devices with a reduced size, we investigate spin-orbit torque in Co/Pt multilayers with strong perpendicular magnetic anisotropy. Note that the spin-orbit torque arises from the global imbalance of the spin currents from the top and bottom interfaces for each Co layer. By inserting Ta or Cu layers to strengthen the top-down asymmetry, the spin-orbit torque efficiency can be greatly modified without compromised perpendicular magnetic anisotropy. Above all, the efficiency builds up as the number of layers increases, realizing robust thermal stability and high spin-orbit-torque efficiency simultaneously in the multilayers structure.
Authors:
; ;  [1] ;  [2]
  1. Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan (China)
  2. Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan (China)
Publication Date:
OSTI Identifier:
22486197
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 23; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANISOTROPY; ASYMMETRY; EFFICIENCY; INTERFACES; LAYERS; SPIN; STABILITY