Magnetic properties and microstructures of single-layered Fe100-xPtx films deposited onto heated substrates
Resource
Thin Solid Films, 520(2), 774-777
Journal
Thin Solid Films
Journal Volume
520
Journal Issue
2
Pages
774-777
Date Issued
2011
Date
2011
Author(s)
Sun, T.H.
Chen, S.C.
Su, W.H.
Shen, C.L.
Kuo, P.C.
Chen, J.R.
Abstract
The single-layered Fe100 - xPtx films of 30 nm thick with Pt contents (x) of 35-57 at.% are deposited on heated Si (100) substrate at a temperature (Ts) of 620 °C by magnetron co-sputtering. When the Pt content in the Fe-Pt alloy film is 35 at.%, the value of in-plane coercivity (Hc//) is close to perpendicular coercivity (Hcτ) and both values are about 800 kA/m. The FePt films exhibit perpendicular magnetic anisotropy when the Pt content increases to the values of between 45 and 51 at.%. The perpendicular coercivity, saturation magnetization (Ms) and perpendicular squareness (Sτ) for Fe54Pt46 film are as high as 1113 kA/m, 0.594 Wb/m2 and 0.96, respectively. These magnetic properties reveal its significant potential as perpendicular magnetic recording media. Upon further increasing the Pt content to 57 at.%, the coercivity of the Fe-Pt film decreases drastically to below 230 kA/m and tends to be closer to in-plane magnetic anisotropy. © 2011 Elsevier B.V. All rights reserved.
Type
journal article
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