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Epitaxial Co/sub 80/Pt/sub 20/ films with in-plane uniaxial anisotropy

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6 Author(s)
B. Xu ; Dept. of Phys. & Astron., Alabama Univ., Tuscaloosa, AL, USA ; J. Du ; T. J. Klemmer ; R. Schad
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Uniaxial Co80Pt20 epitaxial films with in-plane anisotropy were prepared by dc sputter deposition using W/Ag templates on H-terminated Si(110) substrates. The epitaxial relationship as a function of the CoPt thickness, studied by electron and X-ray diffraction, is complex for CoPt thickness < 5 nm. For CoPt thickness > 5 nm, the epitaxial relationship was found to be CoPt(1010)[0001] || W(112)[110] || Ag(110)[001]|| Si(110)[001]. Anisotropy constants were measured using in-plane torque curves and the initial magnetization curves along the hard axis. For 10 to 20 nm thick Co80Pt20, Κ1 was found to be ~ 9 × 106 erg/cc and Κ2 was negligible.

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IEEE Transactions on Magnetics  (Volume:37 ,  Issue: 4 )