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Title: Study of perpendicular anisotropy L1{sub 0}-FePt pseudo spin valves using a micromagnetic trilayer model

A trilayer micromagnetic model based on the Landau-Lifshitz-Bloch equation of motion is utilized to study the properties of L1{sub 0}-FePt/TiN/L1{sub 0}-FePt pseudo spin valves (PSVs) in direct comparison with experiment. Theoretical studies give an insight on the crystallographic texture, magnetic properties, reversal behavior, interlayer coupling effects, and magneto-transport properties of the PSVs, in particular, with varying thickness of the top L1{sub 0}-FePt and TiN spacer. We show that morphological changes in the FePt layers, induced by varying the FePt layer thickness, lead to different hysteresis behaviors of the samples, caused by changes in the interlayer and intralayer exchange couplings. Such effects are important for the optimization of the PSVs due to the relationship between the magnetic properties, domain structures, and the magnetoresistance of the device.
Authors:
 [1] ;  [2] ; ;  [3] ;  [4] ; ;  [1]
  1. Department of Materials Science and Engineering, National University of Singapore, 117576 Singapore (Singapore)
  2. (Singapore)
  3. Department of Physics, University of York, York YO10 5DD (United Kingdom)
  4. Data Storage Institute, Agency of Science, Technology and Research - A*STAR, 117608 Singapore (Singapore)
Publication Date:
OSTI Identifier:
22412861
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 21; Other Information: (c) 2015 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; BLOCH EQUATIONS; COMPARATIVE EVALUATIONS; DOMAIN STRUCTURE; HYSTERESIS; INTERMETALLIC COMPOUNDS; IRON; LAYERS; MAGNETIC PROPERTIES; MAGNETORESISTANCE; MORPHOLOGICAL CHANGES; OPTIMIZATION; PLATINUM; SPACERS; SPIN; TEXTURE; TITANIUM NITRIDES; VALVES