Fabrication of (Co 1-xFe x)-B particles with magnetic softness

Y. Shimada; Y. Endo; M. Yamaguchi; S. Okamoto; O. Kitakami

doi:10.1109/TMAG.2012.2196262

Fabrication of (Co _1-xFe _x)-B particles with magnetic softness

Y. Shimada, Y. Endo, M. Yamaguchi, S. Okamoto, O. Kitakami

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

Abstract

Amorphous Co _xFe _1-x-B particles with magnetic softness were fabricated by chemical reduction of metal ions. Fabrication conditions to obtain particles with good magnetic softness are described. Co _xFe _1-x-B particles with x= 0.90-0.95 exhibit superb softness because of their nearly zero-magnetostrictive property. The soft properties of the particles are thermally stable compared to other compositions such as Fe-B-P or Co ₅₀ Fe ₅₀ -B. Chains of Co _xFe _1-x-B particles with x=0.95 produced in a magnetic field were studied in detail. The high permeability feature associated with the high aspect ratio of the chain shape exhibits only a slight change after annealing up to 400 degrees. The frequency dispersion of initial permeability exhibits two resonance peaks that are ascribed to the shape anisotropy of the chains.

Original language	English
Article number	6332612
Pages (from-to)	2903-2906
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	48
Issue number	11
DOIs	https://doi.org/10.1109/TMAG.2012.2196262
Publication status	Published - 2012 Oct 29

Keywords

Amorphous particles
initial permeability
magnetic softness
particle chain
spin resonance
thermal stability

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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title = "Fabrication of (Co 1-xFe x)-B particles with magnetic softness",

abstract = "Amorphous Co xFe 1-x-B particles with magnetic softness were fabricated by chemical reduction of metal ions. Fabrication conditions to obtain particles with good magnetic softness are described. Co xFe 1-x-B particles with x= 0.90-0.95 exhibit superb softness because of their nearly zero-magnetostrictive property. The soft properties of the particles are thermally stable compared to other compositions such as Fe-B-P or Co 50 Fe 50 -B. Chains of Co xFe 1-x-B particles with x=0.95 produced in a magnetic field were studied in detail. The high permeability feature associated with the high aspect ratio of the chain shape exhibits only a slight change after annealing up to 400 degrees. The frequency dispersion of initial permeability exhibits two resonance peaks that are ascribed to the shape anisotropy of the chains.",

keywords = "Amorphous particles, initial permeability, magnetic softness, particle chain, spin resonance, thermal stability",

author = "Y. Shimada and Y. Endo and M. Yamaguchi and S. Okamoto and O. Kitakami",

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T1 - Fabrication of (Co 1-xFe x)-B particles with magnetic softness

AU - Shimada, Y.

AU - Endo, Y.

AU - Yamaguchi, M.

AU - Okamoto, S.

AU - Kitakami, O.

PY - 2012/10/29

Y1 - 2012/10/29

N2 - Amorphous Co xFe 1-x-B particles with magnetic softness were fabricated by chemical reduction of metal ions. Fabrication conditions to obtain particles with good magnetic softness are described. Co xFe 1-x-B particles with x= 0.90-0.95 exhibit superb softness because of their nearly zero-magnetostrictive property. The soft properties of the particles are thermally stable compared to other compositions such as Fe-B-P or Co 50 Fe 50 -B. Chains of Co xFe 1-x-B particles with x=0.95 produced in a magnetic field were studied in detail. The high permeability feature associated with the high aspect ratio of the chain shape exhibits only a slight change after annealing up to 400 degrees. The frequency dispersion of initial permeability exhibits two resonance peaks that are ascribed to the shape anisotropy of the chains.

AB - Amorphous Co xFe 1-x-B particles with magnetic softness were fabricated by chemical reduction of metal ions. Fabrication conditions to obtain particles with good magnetic softness are described. Co xFe 1-x-B particles with x= 0.90-0.95 exhibit superb softness because of their nearly zero-magnetostrictive property. The soft properties of the particles are thermally stable compared to other compositions such as Fe-B-P or Co 50 Fe 50 -B. Chains of Co xFe 1-x-B particles with x=0.95 produced in a magnetic field were studied in detail. The high permeability feature associated with the high aspect ratio of the chain shape exhibits only a slight change after annealing up to 400 degrees. The frequency dispersion of initial permeability exhibits two resonance peaks that are ascribed to the shape anisotropy of the chains.

KW - Amorphous particles

KW - initial permeability

KW - magnetic softness

KW - particle chain

KW - spin resonance

KW - thermal stability

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