Effect of capped layer on microstructure and magnetic properties of FePt films
Resource
Materials & Design, 31(4), 1742-1745
Journal
Materials & Design (1980-2015)
Pages
1742-1745
Date Issued
2010
Date
2010
Author(s)
Chen, S.C.
Kuo, P.C.
Shen, C.L.
Lin, G.P.
Huang, K.T.
Ou, S.L.
Hong, W.H.
Abstract
Sputter-deposited FePt films exhibit an in-plane magnetic anisotropy when MgO is used as the capped layer. The perpendicular magnetic anisotropy of FePt films can be enhanced by introducing a Ag capped layer instead of a MgO capped layer. Although the in-plane coercivity (Hc//) of FePt films decreases slightly after introducing a Ag capped layer instead of a MgO capped layer, the perpendicular coercivity (Hc⊥) is increased significantly from 3169 Oe to 6726 Oe. Auger electron spectroscopy analysis confirms that Ag atoms diffuse from the capped layer into the FePt magnetic layer and are mainly distributed at the grain boundary of FePt. This phenomenon results in enhancement of the grain boundary energy and inhibition of grain growth, thus increasing the perpendicular coercivity and reducing the grain size of the FePt film. © 2009 Elsevier Ltd. All rights reserved.
Type
journal article
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