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Influence of Intermediate Layer on Magnetic Properties of L1_{0} Ordered FePt Perpendicular Recording Media

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7 Author(s)
Xu Li ; Key Lab. for Magn. & Magn. Mater. of the Minist. of Educ., Lanzhou Univ., Lanzhou, China ; Zhenghua Li ; Liu, Xi ; Li, Yanbo
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The L10 ordered FePt thin films have been prepared by magnetron sputtering system on Cr85W15 underlayer at 500°C of substrate temperature. A 3 nm Pt or W thin interlayer was employed to modulate the magnetic properties of FePt films. The crystallographic relationship between the FePt thin film and the CrW underlayer was studied, and the dependence of FePt films structure and magnetic properties on the Pt or W interlayer was investigated. The M-H loop of the FePt films with Pt or W interlayer was analyzed by using a three-dimensional (3-D) micromagnetic model, with careful discussions of the tetragonal symmetry and the magneto-elastic anisotropy due to the stress in the film plane. The stress state in the films and its effect on magnetic properties were discussed.

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Magnetics, IEEE Transactions on  (Volume:46 ,  Issue: 6 )