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Perpendicular magnetic anisotropy of PdCo and PtCo based multilayers

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3 Author(s)
Tsunashima, S. ; Dept. of Electr. Eng., Nagoya Univ., Japan ; Nakamura, K. ; Uchiyama, S.

Noble metal (Pt, Pd, Cu)/PdCo and Pt/PtCo multilayers were prepared by the RF sputtering method. Effective perpendicular anisotropy was measured by the torque method. It was found that Pd/PdCo and Pt/PdCo multilayers have positive surface anisotropy (Ks), while Cu/PdCo has a negative one. The origin of Ks was inferred to be a magnetoelastic energy of the PdCo layer which results from the lattice misfit between the noble metal and PdCo layers. In Pt/PtCo multilayers, Ks is much smaller than in Pt/PdCo and Pd/PdCo, indicating the absence of magnetoelastic surface anisotropy in PtCo-based multilayers

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Magnetics, IEEE Transactions on  (Volume:26 ,  Issue: 5 )