Department of Physics and Astronomy: Publications and Other Research

 

ORCID IDs

Y. L. Jin

Document Type

Article

Date of this Version

2014

Citation

JOURNAL OF APPLIED PHYSICS 115, 17A739 (2014)

Abstract

The effect of Mo addition on phase composition and nanostructure of nanocrystalline Zr16Co84-xMox (x=0–2.0) melt spun at 55 m/s has been investigated. All the ribbons consist mainly of a hard magnetic Zr2Co11 phase with rhombohedral crystal structure but also contain minor amounts of soft-magnetic phases. The increase in cell volume on alloying suggests that Mo mainly enters the rhombohedral Zr2Co11 structure and occupies the Co site. Mo addition promotes the formation of the hard magnetic phase and increases its volume fraction. The mean grain size of the hard magnetic phase remains almost unchanged with the increase of Mo content. But the average grain size of the soft magnetic phase decreases from about 200nm to 50 nm. This promotes the exchange coupling of the hard and soft magnetic phases and thus leads to a significant increase in coercivity and isotropic energy product, from 0.6 kOe and 0.5 MGOe for x=0 to 2.9 kOe and 4.2 MGOe for x=1.5

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