Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jmmm.2011.11.026
Title: Critical Fe thickness for effective coercivity reduction in FePt/Fe exchange-coupled bilayer
Authors: Huang, L.S.
Hu, J.F.
Chen, J.S. 
Keywords: Critical exchange length
Exchange-coupled
FePt/Fe
Perpendicular recording
Issue Date: Mar-2012
Source: Huang, L.S., Hu, J.F., Chen, J.S. (2012-03). Critical Fe thickness for effective coercivity reduction in FePt/Fe exchange-coupled bilayer. Journal of Magnetism and Magnetic Materials 324 (6) : 1242-1247. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jmmm.2011.11.026
Abstract: FePt/Fe perpendicular exchange-coupled bilayers with different Fe thicknesses were prepared to study the exchange coupling effect and the magnetization switching mechanism. An Fe thickness of 3 nm was found to be the critical point where the coercivity reduction became saturated and had the largest thermal stability gain factor of 2.25. This thickness was close to the exchange length between the magnetically hard and soft layers. Within the exchange length the soft phase strongly coupled to the hard phase and the magnetization of the bilayer processed single switching; beyond the exchange length reversible magnetization increased with the Fe thickness and exchange spring effect was found. Our simulation results also revealed that the exchange length was the critical Fe thickness for effective coercivity reduction and for maintaining high remanence. © 2011 Elsevier B.V. All rights reserved.
Source Title: Journal of Magnetism and Magnetic Materials
URI: http://scholarbank.nus.edu.sg/handle/10635/64839
ISSN: 03048853
DOI: 10.1016/j.jmmm.2011.11.026
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