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Title: Time-domain analysis of spin-torque induced switching paths in nanoscale CoFeB/MgO/CoFeB magnetic tunnel junction devices

We performed thousands of single-shot, real-time measurements of spin-transfer-torque induced switching in nanoscale CoFeB/MgO/CoFeB magnetic tunnel junctions having in-plane magnetizations. Our investigation discovered a variety of switching paths occurring in consecutive, nominally identical switching trials of a single device. By mapping the voltage as a function of time to an effective magnetization angle, we determined that reversal of a single device occurs via a variety of thermally activated paths. Our results show a complex switching behavior that has not been captured by previous observations and cannot be fully explained within the simple macrospin model.
Authors:
 [1] ; ; ;  [2]
  1. Department of Physics and Astronomy, San Jose State University, San Jose, California 95112 (United States)
  2. National Institute of Standards and Technology (NIST), Boulder, Colorado 80305 (United States)
Publication Date:
OSTI Identifier:
22399155
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 24; Other Information: (c) 2014 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; COBALT COMPOUNDS; HETEROJUNCTIONS; IRON BORIDES; MAGNESIUM OXIDES; MAGNETIC FIELD REVERSAL; MAGNETIZATION; SPIN; SUPERCONDUCTING JUNCTIONS; TIME DEPENDENCE