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Anisotropic Local Structure of Co-Pd Alloy and Pd/Co Multilayer Films Having Perpendicular Magnetic Anisotropy

Published online by Cambridge University Press:  15 February 2011

Sang-Koog Kim ,
V.A. Chernov ,
J. B. Kortright  and
Yang-Mo Koo
Sang-Koog Kim
Affiliation:
Advanced Light Source, Lawrence Berkeley National Laboratory, University of California, Berkeley, CA 94720, sangkoog@grace.lbl.gov
V.A. Chernov
Affiliation:
Siberian Synchrotron Radiation Center of Budker Institute of Nuclear Physics, Institute of Catalysis, 630090 Novosibirsk, Russia
J. B. Kortright
Affiliation:
Materials Science Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, CA 94720
Yang-Mo Koo
Affiliation:
Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang 790–784, Republic of Korea
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Abstract

Anisotropie short-range structure in Co-Pd alloy and Pd/Co multilayer films is determined using polarized Co K-edge extended x-ray absorption fine structure. A local modulation of Co fraction exists along the growth direction in the alloy films. Pd underlayer and Pd spacers alternated with the alloy layer influence an effective strain anisotropy. Pd/Co multilayers have an alloy-like region near nominal interfaces by diffuse interface. Pd spacers in the multilayer play a role in coherency strain rather than on broken symmetry of Co atoms. Local structural anisotropy of both strain and chemical environment contribute to the perpendicular magnetic anisotropy observed in these films.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 475: Symposium M – Magnetic Ultrathin Films, Multilayers, and Surfaces – 1997 , 1997 , 399
Copyright
Copyright © Materials Research Society 1997

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References

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