Effect of boron doping on nanostructure and magnetism of rapidly quenched Zr 2 Co 11 -based alloys

Yunlong Jin, Wenyong Zhang, Parashu R. Kharel, Shah R. Valloppilly, Ralph Skomski, David J Sellmyer

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The role of B on the microstructure and magnetism of Zr 16 Co 82.5-x Mo 1.5 B x ribbons prepared by arc melting and melt spinning is investigated. Microstructure analysis show that the ribbons consist of a hard-magnetic rhombohedral Zr 2 Co 11 phase and a minor amount of soft-magnetic Co. We show that the addition of B increases the amount of hard-magnetic phase, reduces the amount of soft-magnetic Co and coarsens the grain size from about 35 nm to 110 nm. There is a monotonic increase in the volume of the rhombohedral Zr 2 Co 11 unit cell with increasing B concentration. This is consistent with a previous theoretical prediction that B may occupy a special type of large interstitial sites, called interruption sites. The optimum magnetic properties, obtained for x = 1, are a saturation magnetization of 7.8 kG, a coercivity of 5.4 kOe, and a maximum energy product of 4.1 MGOe.

Original languageEnglish (US)
Article number056002
JournalAIP Advances
Volume6
Issue number5
DOIs
StatePublished - May 1 2016

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ribbons
boron
arc melting
microstructure
melt spinning
interruption
metal spinning
coercivity
interstitials
grain size
magnetic properties
saturation
magnetization
products
predictions
cells
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Effect of boron doping on nanostructure and magnetism of rapidly quenched Zr 2 Co 11 -based alloys . / Jin, Yunlong; Zhang, Wenyong; Kharel, Parashu R.; Valloppilly, Shah R.; Skomski, Ralph; Sellmyer, David J.

In: AIP Advances, Vol. 6, No. 5, 056002, 01.05.2016.

Research output: Contribution to journalArticle

Jin, Yunlong ; Zhang, Wenyong ; Kharel, Parashu R. ; Valloppilly, Shah R. ; Skomski, Ralph ; Sellmyer, David J. / Effect of boron doping on nanostructure and magnetism of rapidly quenched Zr 2 Co 11 -based alloys In: AIP Advances. 2016 ; Vol. 6, No. 5.
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