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Correlation Between Elastic Constants and Magnetic Anisotropy in Co/Pt Superlattice Thin Films

Published online by Cambridge University Press:  01 February 2011

Nobutomo Nakamura ,
Hirotsugu Ogi ,
Teruo Ono ,
Masahiko Hirao ,
Takeshi Yasui  and
Osamu Matsuda
Nobutomo Nakamura
Affiliation:
Graduate School of Engineering Science, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka 560-8531, Japan.
Hirotsugu Ogi
Affiliation:
Graduate School of Engineering Science, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka 560-8531, Japan.
Teruo Ono
Affiliation:
Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan.
Masahiko Hirao
Affiliation:
Graduate School of Engineering Science, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka 560-8531, Japan.
Takeshi Yasui
Affiliation:
Graduate School of Engineering Science, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka 560-8531, Japan.
Osamu Matsuda
Affiliation:
Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628,Japan.
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Abstract

In this paper, we study contribution of the magnetoelastic anisotropy effect on perpendicular magnetic anisotropy of Co/Pt superlattice thin films. The effective-magnetic anisotropy energy was measured for Co/Pt thin films with a constant Co-layer thickness (4 Å) deposited on silicon substrate by the ultrahigh-vacuum deposition method. As the Pt-layer thickness increases, the effective-magnetic anisotropy energy increases and decreases after showing a maximum at the Pt-layer thickness of 12 Å. This behavior can be explained only by the magnetoelastic anisotropy effect, that is, elastic-strain energy released through the magnetostriction effect with the strain-dependent elastic constants.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 875: Symposium O – Thin Films - Stresses and Mechanical Properties XI , 2005 , O4.23
Copyright
Copyright © Materials Research Society 2005

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