A high moment CoFe soft magnetic thin film prepared by electrodeposition

Tetsuya Osaka; Tokihiko Yokoshima; Daizo Shiga; Kenta Imai; Kyoko Takashima

doi:10.1149/1.1554291

A high moment CoFe soft magnetic thin film prepared by electrodeposition

Tetsuya Osaka^*, Tokihiko Yokoshima, Daizo Shiga, Kenta Imai, Kyoko Takashima

^*Corresponding author for this work

Research Organization for Nano & Life Innovation

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

61 Citations (Scopus)

Abstract

A CoFe binary alloy film with 24 kG of saturation magnetic flux density, B_s, was prepared by electrodeposition. The B_s value of the CoFe alloy film prepared by electrodeposition from the conventional bath is usually equal to 21 kG. With the addition of trimethylamineborane, a well-known reducing agent, the B_s value was found to increase to 23 kG. Furthermore, with the use of a separated compartment dual cell system, a B_s value as high as 24 kG was reached. For obtaining the highest B_s, it was found to be essential to avoid the oxidation of ferrous ion to ferric ion in the plating bath. The coercivity, H_c, values were 15, 14, and 15 Oe for the films with 20, 23, and 24 kG of B_s, respectively. The key for obtaining high B_s materials is to avoid the oxidation of ferrous ions in the bath. In addition, it was found that the H_c value of 15 Oe for CoFe film with the highest B_s value of 24 kG could be lowered to 8 Oe by annealing in an applied magnetic field of 500 Oe.

Original language	English
Pages (from-to)	C53-C55
Journal	Electrochemical and Solid-State Letters
Volume	6
Issue number	4
DOIs	https://doi.org/10.1149/1.1554291
Publication status	Published - 2003 Apr 1

ASJC Scopus subject areas

Chemical Engineering(all)
Materials Science(all)
Physical and Theoretical Chemistry
Electrochemistry
Electrical and Electronic Engineering

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title = "A high moment CoFe soft magnetic thin film prepared by electrodeposition",

abstract = "A CoFe binary alloy film with 24 kG of saturation magnetic flux density, Bs, was prepared by electrodeposition. The Bs value of the CoFe alloy film prepared by electrodeposition from the conventional bath is usually equal to 21 kG. With the addition of trimethylamineborane, a well-known reducing agent, the Bs value was found to increase to 23 kG. Furthermore, with the use of a separated compartment dual cell system, a Bs value as high as 24 kG was reached. For obtaining the highest Bs, it was found to be essential to avoid the oxidation of ferrous ion to ferric ion in the plating bath. The coercivity, Hc, values were 15, 14, and 15 Oe for the films with 20, 23, and 24 kG of Bs, respectively. The key for obtaining high Bs materials is to avoid the oxidation of ferrous ions in the bath. In addition, it was found that the Hc value of 15 Oe for CoFe film with the highest Bs value of 24 kG could be lowered to 8 Oe by annealing in an applied magnetic field of 500 Oe.",

author = "Tetsuya Osaka and Tokihiko Yokoshima and Daizo Shiga and Kenta Imai and Kyoko Takashima",

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T1 - A high moment CoFe soft magnetic thin film prepared by electrodeposition

AU - Osaka, Tetsuya

AU - Yokoshima, Tokihiko

AU - Shiga, Daizo

AU - Imai, Kenta

AU - Takashima, Kyoko

PY - 2003/4/1

Y1 - 2003/4/1

N2 - A CoFe binary alloy film with 24 kG of saturation magnetic flux density, Bs, was prepared by electrodeposition. The Bs value of the CoFe alloy film prepared by electrodeposition from the conventional bath is usually equal to 21 kG. With the addition of trimethylamineborane, a well-known reducing agent, the Bs value was found to increase to 23 kG. Furthermore, with the use of a separated compartment dual cell system, a Bs value as high as 24 kG was reached. For obtaining the highest Bs, it was found to be essential to avoid the oxidation of ferrous ion to ferric ion in the plating bath. The coercivity, Hc, values were 15, 14, and 15 Oe for the films with 20, 23, and 24 kG of Bs, respectively. The key for obtaining high Bs materials is to avoid the oxidation of ferrous ions in the bath. In addition, it was found that the Hc value of 15 Oe for CoFe film with the highest Bs value of 24 kG could be lowered to 8 Oe by annealing in an applied magnetic field of 500 Oe.

AB - A CoFe binary alloy film with 24 kG of saturation magnetic flux density, Bs, was prepared by electrodeposition. The Bs value of the CoFe alloy film prepared by electrodeposition from the conventional bath is usually equal to 21 kG. With the addition of trimethylamineborane, a well-known reducing agent, the Bs value was found to increase to 23 kG. Furthermore, with the use of a separated compartment dual cell system, a Bs value as high as 24 kG was reached. For obtaining the highest Bs, it was found to be essential to avoid the oxidation of ferrous ion to ferric ion in the plating bath. The coercivity, Hc, values were 15, 14, and 15 Oe for the films with 20, 23, and 24 kG of Bs, respectively. The key for obtaining high Bs materials is to avoid the oxidation of ferrous ions in the bath. In addition, it was found that the Hc value of 15 Oe for CoFe film with the highest Bs value of 24 kG could be lowered to 8 Oe by annealing in an applied magnetic field of 500 Oe.

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A high moment CoFe soft magnetic thin film prepared by electrodeposition

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