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

Abstract

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]; ;  [1]
  1. Department of Materials Science and Engineering, National University of Singapore, 117576 Singapore (Singapore)
  2. Department of Physics, University of York, York YO10 5DD (United Kingdom)
  3. Data Storage Institute, Agency of Science, Technology and Research - A*STAR, 117608 Singapore (Singapore)
Publication Date:
OSTI Identifier:
22412861
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 117; Journal Issue: 21; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
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

Citation Formats

Ho, Pin, Data Storage Institute, Agency of Science, Technology and Research - A*STAR, 117608 Singapore, Evans, Richard F. L., Chantrell, Roy W., Han, Guchang, Chow, Gan-Moog, and Chen, Jingsheng. Study of perpendicular anisotropy L1{sub 0}-FePt pseudo spin valves using a micromagnetic trilayer model. United States: N. p., 2015. Web. doi:10.1063/1.4921828.
Ho, Pin, Data Storage Institute, Agency of Science, Technology and Research - A*STAR, 117608 Singapore, Evans, Richard F. L., Chantrell, Roy W., Han, Guchang, Chow, Gan-Moog, & Chen, Jingsheng. Study of perpendicular anisotropy L1{sub 0}-FePt pseudo spin valves using a micromagnetic trilayer model. United States. https://doi.org/10.1063/1.4921828
Ho, Pin, Data Storage Institute, Agency of Science, Technology and Research - A*STAR, 117608 Singapore, Evans, Richard F. L., Chantrell, Roy W., Han, Guchang, Chow, Gan-Moog, and Chen, Jingsheng. 2015. "Study of perpendicular anisotropy L1{sub 0}-FePt pseudo spin valves using a micromagnetic trilayer model". United States. https://doi.org/10.1063/1.4921828.
@article{osti_22412861,
title = {Study of perpendicular anisotropy L1{sub 0}-FePt pseudo spin valves using a micromagnetic trilayer model},
author = {Ho, Pin and Data Storage Institute, Agency of Science, Technology and Research - A*STAR, 117608 Singapore and Evans, Richard F. L. and Chantrell, Roy W. and Han, Guchang and Chow, Gan-Moog and Chen, Jingsheng},
abstractNote = {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.},
doi = {10.1063/1.4921828},
url = {https://www.osti.gov/biblio/22412861}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 21,
volume = 117,
place = {United States},
year = {Sun Jun 07 00:00:00 EDT 2015},
month = {Sun Jun 07 00:00:00 EDT 2015}
}