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

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

Research output: Contribution to journalArticlepeer-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 languageEnglish
Pages (from-to)277-280
Number of pages4
JournalMaterials Letters
Volume14
Issue number5-6
DOIs
Publication statusPublished - Sep 1992

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