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Large Magnetic Anisotropy in Co3Pt Ordered Phase Thin Films

Published online by Cambridge University Press:  10 February 2011

Yoshiyasu Yamada  and
Takao Suzuki
Yoshiyasu Yamada
Affiliation:
Information Storage Materials Laboratory, Toyota Technological Institute, 2-12-1, Hisakata, Tempaku, Nagoya, Japan
Takao Suzuki
Affiliation:
Information Storage Materials Laboratory, Toyota Technological Institute, 2-12-1, Hisakata, Tempaku, Nagoya, Japan
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Abstract

The very large perpendicular magnetic anisotropy of the order of 2 x 107 erg/cm3 at room temperature was found in CoJ-x Ptx(0<x<0.5) alloy thin films made by e-beam evaporation. The large magnetic anisotropy is likely related to the anisotropic Co-Co bonding distribution, which is similar to the cases of Co/Pt multilayers and FePt alloy thin films. The activation energy estimated for the ordering is approximately 0.3 eV, which is preferably compared to 0.2 eV for FePt. A model is proposed, for which both a short range and long range ordering are present, depending on substrate deposition temperature.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 517: Symposium F – Wide Bandgap Semiconductors for High Power, High Frequency , January 1998 , 299
Copyright
Copyright © Materials Research Society 1998

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