Effect of Co replacement with Fe on uniaxial magnetocrystalline anisotropy in disordered hcp CoPtRh alloy films

Naoki Nozawa; Shin Saito; Shintaro Hinata; Migaku Takahashi

doi:10.1109/TMAG.2013.2246833

Effect of Co replacement with Fe on uniaxial magnetocrystalline anisotropy in disordered hcp CoPtRh alloy films

Naoki Nozawa, Shin Saito, Shintaro Hinata, Migaku Takahashi

ENG - Electronic Engineering

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

The effect of replacing Co with Fe in disordered CoPtRh alloy films was investigated with the aim to increase the spin magnetic moment. The addition of Fe into a pure Co film produced a Co₉₈Fe₂ film with maximum uniaxial magnetocrystalline anisotropy (K_u), because the magnetic moment is increased with the same degree of stacking faults (SFs) induced into the hcp grains as that for a pure Co film. (Co _0.98Fe_0.02)PtRh films were compared with CoPtRh films with the same Pt and Rh contents, which revealed that: 1) the degree of SFs were increased; 2) the magnetic moment was increased; and 3) K_u was decreased for all compositions in the (Co_0.98Fe_0.02)PtRh films. In particular, the (Co_0.98Fe_0.02)PtRh and CoPtRh films with a larger Rh content than Pt have a greater range for increase of the K_u magnitude by enhancement of the magnetic moment with the retention of or further decrease in the degree of SFs.

Original language	English
Article number	6559041
Pages (from-to)	3596-3599
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	49
Issue number	7
DOIs	https://doi.org/10.1109/TMAG.2013.2246833
Publication status	Published - 2013

Keywords

Hcp CoPtRh alloy films
magnetocrystalline anisotropy
spin-orbit interaction
stacking faults

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2013.2246833

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title = "Effect of Co replacement with Fe on uniaxial magnetocrystalline anisotropy in disordered hcp CoPtRh alloy films",

abstract = "The effect of replacing Co with Fe in disordered CoPtRh alloy films was investigated with the aim to increase the spin magnetic moment. The addition of Fe into a pure Co film produced a Co98Fe2 film with maximum uniaxial magnetocrystalline anisotropy (Ku), because the magnetic moment is increased with the same degree of stacking faults (SFs) induced into the hcp grains as that for a pure Co film. (Co 0.98Fe0.02)PtRh films were compared with CoPtRh films with the same Pt and Rh contents, which revealed that: 1) the degree of SFs were increased; 2) the magnetic moment was increased; and 3) Ku was decreased for all compositions in the (Co0.98Fe0.02)PtRh films. In particular, the (Co0.98Fe0.02)PtRh and CoPtRh films with a larger Rh content than Pt have a greater range for increase of the Ku magnitude by enhancement of the magnetic moment with the retention of or further decrease in the degree of SFs.",

keywords = "Hcp CoPtRh alloy films, magnetocrystalline anisotropy, spin-orbit interaction, stacking faults",

author = "Naoki Nozawa and Shin Saito and Shintaro Hinata and Migaku Takahashi",

year = "2013",

doi = "10.1109/TMAG.2013.2246833",

language = "English",

volume = "49",

pages = "3596--3599",

journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

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T1 - Effect of Co replacement with Fe on uniaxial magnetocrystalline anisotropy in disordered hcp CoPtRh alloy films

AU - Nozawa, Naoki

AU - Saito, Shin

AU - Hinata, Shintaro

AU - Takahashi, Migaku

PY - 2013

Y1 - 2013

N2 - The effect of replacing Co with Fe in disordered CoPtRh alloy films was investigated with the aim to increase the spin magnetic moment. The addition of Fe into a pure Co film produced a Co98Fe2 film with maximum uniaxial magnetocrystalline anisotropy (Ku), because the magnetic moment is increased with the same degree of stacking faults (SFs) induced into the hcp grains as that for a pure Co film. (Co 0.98Fe0.02)PtRh films were compared with CoPtRh films with the same Pt and Rh contents, which revealed that: 1) the degree of SFs were increased; 2) the magnetic moment was increased; and 3) Ku was decreased for all compositions in the (Co0.98Fe0.02)PtRh films. In particular, the (Co0.98Fe0.02)PtRh and CoPtRh films with a larger Rh content than Pt have a greater range for increase of the Ku magnitude by enhancement of the magnetic moment with the retention of or further decrease in the degree of SFs.

AB - The effect of replacing Co with Fe in disordered CoPtRh alloy films was investigated with the aim to increase the spin magnetic moment. The addition of Fe into a pure Co film produced a Co98Fe2 film with maximum uniaxial magnetocrystalline anisotropy (Ku), because the magnetic moment is increased with the same degree of stacking faults (SFs) induced into the hcp grains as that for a pure Co film. (Co 0.98Fe0.02)PtRh films were compared with CoPtRh films with the same Pt and Rh contents, which revealed that: 1) the degree of SFs were increased; 2) the magnetic moment was increased; and 3) Ku was decreased for all compositions in the (Co0.98Fe0.02)PtRh films. In particular, the (Co0.98Fe0.02)PtRh and CoPtRh films with a larger Rh content than Pt have a greater range for increase of the Ku magnitude by enhancement of the magnetic moment with the retention of or further decrease in the degree of SFs.

KW - Hcp CoPtRh alloy films

KW - magnetocrystalline anisotropy

KW - spin-orbit interaction

KW - stacking faults

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JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 7

M1 - 6559041

ER -

Effect of Co replacement with Fe on uniaxial magnetocrystalline anisotropy in disordered hcp CoPtRh alloy films

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Keywords

ASJC Scopus subject areas

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