Chemical ordering of FePt films using millisecond flash-lamp annealing

The structural and magnetic properties of 20-nm-thick Fe x Pt 100-x films that were processed by 20ms flash-lamp annealing were investigated. A maximum in coercivity of (10.4±0.5) kOe was achieved for a composition of Fe 53 Pt 47 , which shows also a high degree of L1 0 chemical order. A variation o...

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Bibliographic Details
Published in:Journal of applied physics 2012-01, Vol.111 (2), p.023902-023902-4
Main Authors: Brombacher, C., Schubert, C., Daniel, M., Liebig, A., Beddies, G., Schumann, T., Skorupa, W., Donges, J., Häberlein, S., Albrecht, M.
Format: Article
Language:English
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Summary:The structural and magnetic properties of 20-nm-thick Fe x Pt 100-x films that were processed by 20ms flash-lamp annealing were investigated. A maximum in coercivity of (10.4±0.5) kOe was achieved for a composition of Fe 53 Pt 47 , which shows also a high degree of L1 0 chemical order. A variation of the chemical composition toward either higher or lower Fe content leads to a lowering of the coercivity, which can be attributed to a reduction in L1 0 ordered volume fraction. Thus, in the millisecond time regime, the fastest ordering transformation occurs for slightly Fe-rich FePt films.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.3677991