Pinning controlled coercivity in rapidly solidified, low boron Fe-Nd-B-Nb alloys

M. Leonowicz; Azwar Manaf; H. A. Davies

doi:10.1016/0167-577X(92)90036-J

Pinning controlled coercivity in rapidly solidified, low boron Fe-Nd-B-Nb alloys

M. Leonowicz, Azwar Manaf, H. A. Davies

Department of Physics

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

2 Citations (Scopus)

Abstract

Evidence is presented for pinning controlled coercivity in boron deficient rapidly quenched Fe-Nd-B alloys with additions up to 1.6 at% Nb, In the directly quenched state, the Nb-containing alloy exhibits similar properties to a similar ternary Fe-Nd-B alloy, with enhanced remanence (>0.9 T) and intrinsic coercivity of about 1100 kA m^-1. Annealing of overquenched ribbon brings about an increase of the coercivity by up to 30% and a decrease of remanence at a rate of 0.04 T/at% Nb. This phenomenon is associated with precipitation of fine (≈ 5 nm) diameter particles within the hard magnetic phase. These precipitates are considered to create pinning centres for domain wall movement.

Original language	English
Pages (from-to)	277-280
Number of pages	4
Journal	Materials Letters
Volume	14
Issue number	5-6
DOIs	https://doi.org/10.1016/0167-577X(92)90036-J
Publication status	Published - Sept 1992

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title = "Pinning controlled coercivity in rapidly solidified, low boron Fe-Nd-B-Nb alloys",

abstract = "Evidence is presented for pinning controlled coercivity in boron deficient rapidly quenched Fe-Nd-B alloys with additions up to 1.6 at% Nb, In the directly quenched state, the Nb-containing alloy exhibits similar properties to a similar ternary Fe-Nd-B alloy, with enhanced remanence (>0.9 T) and intrinsic coercivity of about 1100 kA m-1. Annealing of overquenched ribbon brings about an increase of the coercivity by up to 30% and a decrease of remanence at a rate of 0.04 T/at% Nb. This phenomenon is associated with precipitation of fine (≈ 5 nm) diameter particles within the hard magnetic phase. These precipitates are considered to create pinning centres for domain wall movement.",

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AU - Leonowicz, M.

AU - Manaf, Azwar

AU - Davies, H. A.

PY - 1992/9

Y1 - 1992/9

N2 - Evidence is presented for pinning controlled coercivity in boron deficient rapidly quenched Fe-Nd-B alloys with additions up to 1.6 at% Nb, In the directly quenched state, the Nb-containing alloy exhibits similar properties to a similar ternary Fe-Nd-B alloy, with enhanced remanence (>0.9 T) and intrinsic coercivity of about 1100 kA m-1. Annealing of overquenched ribbon brings about an increase of the coercivity by up to 30% and a decrease of remanence at a rate of 0.04 T/at% Nb. This phenomenon is associated with precipitation of fine (≈ 5 nm) diameter particles within the hard magnetic phase. These precipitates are considered to create pinning centres for domain wall movement.

AB - Evidence is presented for pinning controlled coercivity in boron deficient rapidly quenched Fe-Nd-B alloys with additions up to 1.6 at% Nb, In the directly quenched state, the Nb-containing alloy exhibits similar properties to a similar ternary Fe-Nd-B alloy, with enhanced remanence (>0.9 T) and intrinsic coercivity of about 1100 kA m-1. Annealing of overquenched ribbon brings about an increase of the coercivity by up to 30% and a decrease of remanence at a rate of 0.04 T/at% Nb. This phenomenon is associated with precipitation of fine (≈ 5 nm) diameter particles within the hard magnetic phase. These precipitates are considered to create pinning centres for domain wall movement.

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DO - 10.1016/0167-577X(92)90036-J

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VL - 14

SP - 277

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JO - Materials Letters

JF - Materials Letters

IS - 5-6

ER -

Pinning controlled coercivity in rapidly solidified, low boron Fe-Nd-B-Nb alloys

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