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

Journal Article · Sun Jun 07 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4921828· OSTI ID:22412861

Ho, Pin ^[1]; Evans, Richard F. L.; Chantrell, Roy W. ^[2]; Han, Guchang ^[3]; Chow, Gan-Moog; Chen, Jingsheng ^[1]

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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)

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.

• OSTI ID: 22412861
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 21; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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