Magnetic properties and microstructure of graded Fe/FePt films

A soft/hard Fe/FePt bilayer with perpendicular magnetization was prepared on a glass substrate. Annealed Fe/FePt film allowed modification of the Fe/FePt sharp interface to Fe/(Fe-rich FePt)/FePt graded interface with rigid magnetization due to the nanoscale soft/hard interface coupling. The magneti...

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Bibliographic Details
Published in:Journal of applied physics 2010-06, Vol.107 (11), p.113923-113923-5
Main Authors: Tsai, Jai-Lin, Tzeng, Hsin-Te, Liu, Bing-Fong
Format: Article
Language:English
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Summary:A soft/hard Fe/FePt bilayer with perpendicular magnetization was prepared on a glass substrate. Annealed Fe/FePt film allowed modification of the Fe/FePt sharp interface to Fe/(Fe-rich FePt)/FePt graded interface with rigid magnetization due to the nanoscale soft/hard interface coupling. The magnetization was reversed at a single switching field and interpreted by the two-spin model. When the annealed temperature of the Fe/FePt film increased, the remanence magnetization decreased continuously but the out-of-plane coercivity increased obviously at 600 - 700 ° C which was interpreted by the graded magnetic anisotropy. The coercivity can be tuning in the exchange coupled composite film.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.3446198