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Title: Thermally assisted magnetic switching of a single perpendicularly magnetized layer induced by an in-plane current

We report that by heating samples the critical current density for magnetization reversal (J{sub c}) in a single perpendicularly magnetized layer can be decreased from 2.6 × 10{sup 7 }A/cm{sup 2} to about 1 × 10{sup 6 }A/cm{sup 2} for a temperature increase of 143 K. The nonlinear dependence of J{sub c} on the perpendicular anisotropy field indicates that the coherent magnetic switching model cannot fully explain the current-induced perpendicular switching. By considering the current-induced domain nucleation and expansion during switching, we conclude that J{sub c} also depends on current-induced domain behavior. Moreover, by reversing the heat flow direction, we demonstrate that the thermal related spin transfer torques have little influence on the thermally assisted magnetic switching.
Authors:
; ; ; ; ; ;  [1] ; ;  [2]
  1. Laboratory of Nano-fabrication and Novel Devices Integrated Technology, Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029 (China)
  2. Collaborative Innovation Center for Magnetoelectric Industry CTGU, College of Science, China Three Gorges University, Yichang 443002 (China)
Publication Date:
OSTI Identifier:
22311086
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANISOTROPY; CRITICAL CURRENT; CURRENT DENSITY; EXPANSION; HEAT FLUX; HEATING; LAYERS; MAGNETIC PROPERTIES; MAGNETIZATION; NONLINEAR PROBLEMS; SPIN; TORQUE