Coercivity enhancement in L11 Co50-xCuxPt50 thin films
Resource
Journal of Applied Physics, 109(7), 07B714
Journal
Journal of Applied Physics
Pages
07B714
Date Issued
2011
Date
2011
Author(s)
Yuan, Fu-Te
Sun, An-Cheng
Hsu, Jen-Hwa
Tan, C.S.
Kuo, P.C.
Liao, W.M.
Lee, H.Y.
Abstract
This study investigates structural and magnetic properties of the (Co50-xCux)Pt50 films deposited on the MgO(111) substrate. Experimental results indicate that adding Cu significantly improves the alignment of L11[111] and decreases the structural defects of the epitaxial films. Additionally, a large increment of an order of magnitude in out-of-plane coercivity (Hc⊥) from 0.2 to 2.2 kOe is achieved when x is increased from 0 to 23. Such an increase accompanies a reduction of in-plane coercivity (Hc
) from 1.5 to less than 0.1 kOe. The enhancement in Hc⊥ is attributed to the domain wall pinning effect induced by compositional segregation of Cu and Co. This study provides an effective approach to optimize the perpendicular magnetic properties of L11 CoPt.
Type
journal article
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