Control of Soft Magnetism of Co-Zr and Co-Zr-Ta Films for Backlayers in Perpendicular Magnetic Recording Media

Shigeki NAKAGAWA; Masahiko NAOE

Control of Soft Magnetism of Co-Zr and Co-Zr-Ta Films for Backlayers in Perpendicular Magnetic Recording Media

Shigeki NAKAGAWA, Masahiko NAOE

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Co-Zr and Co-Zr-Ta amorphous films were prepared by the Kr sputtering method for use as the backlayers of Co-Cr perpendicular magnetic recording tape media. The effect of the addition of Ta to Co-Zr thin films was also investigated. Lower substrate temperature was required to prepare amorphous Co-Zr films with excellent soft magnetic properties. The relationships among Ta content X, magnetostriction constant λ and magnetic characteristics such as coercivity H_c and relative permeability µ_r were clarified. A method of evaluating λ of soft magnetic thin films deposited on polymer sheet substrate has been presented. Films with composition of (Co_95.7Zr_4.3) _100-X Ta_X at X of 10 at.% possessed sufficiency soft magnetic properties such as low H_c below 80 A/m and high µ_r above 600. Addition of Ta was effective in changing change the sign of λ from positive to negative. It was found that the negative magnetoelastic energy and the smaller λ caused the soft magnetism.

Publication: IEICE TRANSACTIONS on Electronics Vol.E78-C No.11 pp.1557-1561

Publication Date: 1995/11/25

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Type of Manuscript: Special Section PAPER (Special Issue on Ultra High Density Information Storage Technologies)

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Shigeki NAKAGAWA, Masahiko NAOE, "Control of Soft Magnetism of Co-Zr and Co-Zr-Ta Films for Backlayers in Perpendicular Magnetic Recording Media" in IEICE TRANSACTIONS on Electronics, vol. E78-C, no. 11, pp. 1557-1561, November 1995, doi: .
Abstract: Co-Zr and Co-Zr-Ta amorphous films were prepared by the Kr sputtering method for use as the backlayers of Co-Cr perpendicular magnetic recording tape media. The effect of the addition of Ta to Co-Zr thin films was also investigated. Lower substrate temperature was required to prepare amorphous Co-Zr films with excellent soft magnetic properties. The relationships among Ta content X, magnetostriction constant λ and magnetic characteristics such as coercivity H_c and relative permeability µ_r were clarified. A method of evaluating λ of soft magnetic thin films deposited on polymer sheet substrate has been presented. Films with composition of (Co_95.7Zr_4.3) _100-X Ta_X at X of 10 at.% possessed sufficiency soft magnetic properties such as low H_c below 80 A/m and high µ_r above 600. Addition of Ta was effective in changing change the sign of λ from positive to negative. It was found that the negative magnetoelastic energy and the smaller λ caused the soft magnetism.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/e78-c_11_1557/_p

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@ARTICLE{e78-c_11_1557,
author={Shigeki NAKAGAWA, Masahiko NAOE, },
journal={IEICE TRANSACTIONS on Electronics},
title={Control of Soft Magnetism of Co-Zr and Co-Zr-Ta Films for Backlayers in Perpendicular Magnetic Recording Media},
year={1995},
volume={E78-C},
number={11},
pages={1557-1561},
abstract={Co-Zr and Co-Zr-Ta amorphous films were prepared by the Kr sputtering method for use as the backlayers of Co-Cr perpendicular magnetic recording tape media. The effect of the addition of Ta to Co-Zr thin films was also investigated. Lower substrate temperature was required to prepare amorphous Co-Zr films with excellent soft magnetic properties. The relationships among Ta content X, magnetostriction constant λ and magnetic characteristics such as coercivity H_c and relative permeability µ_r were clarified. A method of evaluating λ of soft magnetic thin films deposited on polymer sheet substrate has been presented. Films with composition of (Co_95.7Zr_4.3) _100-X Ta_X at X of 10 at.% possessed sufficiency soft magnetic properties such as low H_c below 80 A/m and high µ_r above 600. Addition of Ta was effective in changing change the sign of λ from positive to negative. It was found that the negative magnetoelastic energy and the smaller λ caused the soft magnetism.},
keywords={},
doi={},
ISSN={},
month={November},}

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TY - JOUR
TI - Control of Soft Magnetism of Co-Zr and Co-Zr-Ta Films for Backlayers in Perpendicular Magnetic Recording Media
T2 - IEICE TRANSACTIONS on Electronics
SP - 1557
EP - 1561
AU - Shigeki NAKAGAWA
AU - Masahiko NAOE
PY - 1995
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E78-C
IS - 11
JA - IEICE TRANSACTIONS on Electronics
Y1 - November 1995
AB - Co-Zr and Co-Zr-Ta amorphous films were prepared by the Kr sputtering method for use as the backlayers of Co-Cr perpendicular magnetic recording tape media. The effect of the addition of Ta to Co-Zr thin films was also investigated. Lower substrate temperature was required to prepare amorphous Co-Zr films with excellent soft magnetic properties. The relationships among Ta content X, magnetostriction constant λ and magnetic characteristics such as coercivity H_c and relative permeability µ_r were clarified. A method of evaluating λ of soft magnetic thin films deposited on polymer sheet substrate has been presented. Films with composition of (Co_95.7Zr_4.3) _100-X Ta_X at X of 10 at.% possessed sufficiency soft magnetic properties such as low H_c below 80 A/m and high µ_r above 600. Addition of Ta was effective in changing change the sign of λ from positive to negative. It was found that the negative magnetoelastic energy and the smaller λ caused the soft magnetism.
ER -