Structural and magnetic properties of high saturation induction CoNiFe electroplated films

N. Ohshima; M. Saito; K. Ohashi; H. Yamamoto; K. Mibu

doi:10.1109/20.950962

Structural and magnetic properties of high saturation induction CoNiFe electroplated films

N. Ohshima^*, M. Saito, K. Ohashi, H. Yamamoto, K. Mibu

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

5 Citations (Scopus)

Abstract

The structure and saturation induction (B_s) of Co_90-xNi₁₀Fe_x (8 ≤ x ≤ 40) electroplated films have been studied with a view to their use as high-density write-core materials. The B_s of the films were slightly larger than those of CoNiFe powders and were increased into the 1.8 to 2.1 T range by controlling the Fe composition and the amount of bcc phase. The latter was achieved by controlling the plating conditions, i.e., the current density and bath temperature. The hyperfine field of the films was about 34 T, slightly larger than that of the powders (33 T), suggesting that their magnetic moments were slightly larger than those of equivalent bulk alloys. The B_s values were increased by increases of the amount of bcc phase relative to the equilibrium phase with increasing the magnetic moments. A band calculation showed that the bcc phase had a larger magnetization than the fcc phase although the difference between the total energies of the two phases was fairly small. This confirmed our results.

Original language	English
Pages (from-to)	1767-1769
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	37
Issue number	4 I
DOIs	https://doi.org/10.1109/20.950962
Publication status	Published - 2001 Jul
Externally published	Yes
Event	8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States Duration: 2001 Jan 7 → 2001 Jan 11

Keywords

Band calculation
Electroplating
High B material
Magnetization
Mössbauer effect
Soft-magnetic material

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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title = "Structural and magnetic properties of high saturation induction CoNiFe electroplated films",

abstract = "The structure and saturation induction (Bs) of Co90-xNi10Fex (8 ≤ x ≤ 40) electroplated films have been studied with a view to their use as high-density write-core materials. The Bs of the films were slightly larger than those of CoNiFe powders and were increased into the 1.8 to 2.1 T range by controlling the Fe composition and the amount of bcc phase. The latter was achieved by controlling the plating conditions, i.e., the current density and bath temperature. The hyperfine field of the films was about 34 T, slightly larger than that of the powders (33 T), suggesting that their magnetic moments were slightly larger than those of equivalent bulk alloys. The Bs values were increased by increases of the amount of bcc phase relative to the equilibrium phase with increasing the magnetic moments. A band calculation showed that the bcc phase had a larger magnetization than the fcc phase although the difference between the total energies of the two phases was fairly small. This confirmed our results.",

keywords = "Band calculation, Electroplating, High B material, Magnetization, M{\"o}ssbauer effect, Soft-magnetic material",

author = "N. Ohshima and M. Saito and K. Ohashi and H. Yamamoto and K. Mibu",

year = "2001",

month = jul,

doi = "10.1109/20.950962",

language = "English",

volume = "37",

pages = "1767--1769",

journal = "IEEE Transactions on Magnetics",

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T1 - Structural and magnetic properties of high saturation induction CoNiFe electroplated films

AU - Ohshima, N.

AU - Saito, M.

AU - Ohashi, K.

AU - Yamamoto, H.

AU - Mibu, K.

PY - 2001/7

Y1 - 2001/7

N2 - The structure and saturation induction (Bs) of Co90-xNi10Fex (8 ≤ x ≤ 40) electroplated films have been studied with a view to their use as high-density write-core materials. The Bs of the films were slightly larger than those of CoNiFe powders and were increased into the 1.8 to 2.1 T range by controlling the Fe composition and the amount of bcc phase. The latter was achieved by controlling the plating conditions, i.e., the current density and bath temperature. The hyperfine field of the films was about 34 T, slightly larger than that of the powders (33 T), suggesting that their magnetic moments were slightly larger than those of equivalent bulk alloys. The Bs values were increased by increases of the amount of bcc phase relative to the equilibrium phase with increasing the magnetic moments. A band calculation showed that the bcc phase had a larger magnetization than the fcc phase although the difference between the total energies of the two phases was fairly small. This confirmed our results.

AB - The structure and saturation induction (Bs) of Co90-xNi10Fex (8 ≤ x ≤ 40) electroplated films have been studied with a view to their use as high-density write-core materials. The Bs of the films were slightly larger than those of CoNiFe powders and were increased into the 1.8 to 2.1 T range by controlling the Fe composition and the amount of bcc phase. The latter was achieved by controlling the plating conditions, i.e., the current density and bath temperature. The hyperfine field of the films was about 34 T, slightly larger than that of the powders (33 T), suggesting that their magnetic moments were slightly larger than those of equivalent bulk alloys. The Bs values were increased by increases of the amount of bcc phase relative to the equilibrium phase with increasing the magnetic moments. A band calculation showed that the bcc phase had a larger magnetization than the fcc phase although the difference between the total energies of the two phases was fairly small. This confirmed our results.

KW - Band calculation

KW - Electroplating

KW - High B material

KW - Magnetization

KW - Mössbauer effect

KW - Soft-magnetic material

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JO - IEEE Transactions on Magnetics

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ER -

Structural and magnetic properties of high saturation induction CoNiFe electroplated films

Abstract

Keywords

ASJC Scopus subject areas

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