Ultra-thin L1{sub 0}-FePt for perpendicular anisotropy L1{sub 0}-FePt/Ag/[Co/Pd]{sub 30} pseudo spin valves

Journal Article · Wed May 07 04:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4853175· OSTI ID:22273945

Ho, Pin; Chow, Gan Moog; Chen, Jing-Sheng ^[1]; Han, Guchang ^[2]; He, Kaihua ^[3]

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1. Department of Materials Science and Engineering, National University of Singapore, Singapore 117576 (Singapore)
2. Data Storage Institute, Agency of Science, Technology and Research (A-STAR), Singapore 117608 (Singapore)
3. School of Mathematics and Physics, China University of Geosciences, Wuhan 430074 (China)

Perpendicular anisotropy L1{sub 0}-FePt/Ag/[Co/Pd]{sub 30} pseudo spin valves (PSVs) with ultra-thin L1{sub 0}-FePt alloy free layer possessing high anisotropy and thermal stability have been fabricated and studied. The thickness of the L1{sub 0}-FePt layer was varied between 2 and 4 nm. The PSV became increasingly decoupled with reduced L1{sub 0}-FePt thickness due to the larger difference between the coercivity of the L1{sub 0}-FePt and [Co/Pd]{sub 30} films. The PSV with an ultra-thin L1{sub 0}-FePt free layer of 2 nm displayed a high K{sub u} of 2.21 × 10{sup 7} ergs/cm{sup 3}, high thermal stability of 84 and a largest giant magnetoresistance of 0.54%.

• OSTI ID: 22273945
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 17 Vol. 115; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
COERCIVE FORCE
INTERFACES
INTERMETALLIC COMPOUNDS
IRON
LAYERS
MAGNETORESISTANCE
PALLADIUM
PHASE STABILITY
PLATINUM
SILVER
SPIN
THICKNESS
THIN FILMS
VALVES