Magnetization of Pt in the Co/Pt(110) system investigated with surface x-ray magnetic diffraction: Evidence for in-plane magnetic anisotropy

J. Alvarez1, E. Lundgren1,2, X. Torrelles1,3, H. Isern1,4, K.F. Peters1, P. Steadman1, S. Ferrer1

1European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex, France
2Institut für Allgemeine Physik, Technische Universität Wien, A-1040 Wien, Austria
3Institut de Ciencia de Materials de Barcelona (C.S.I.C), 08193 Bellaterra, Spain
4Institut de Ciencia de Materials de Barcelona (C.S.I.C), 28049 Cantoblanco, Spain

Phys. Rev. B 60, 10193-10198

Ultrathin films of Co were deposited in situ on a well-prepared Pt(110) single-crystal surface and the induced magnetization of the Pt atoms at the interface was investigated with resonant magnetic surface x-ray-diffraction measurements at the L absorption edges of Pt. The measurements indicate that the magnetization of the Pt atoms extends to three atomic layers below the Co film and that a strong in-plane magnetic anisotropy exists. The easy direction of magnetization in the surface plane is perpendicular to the close-packed atomic rows in the Pt substrate.

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