Hf-Co and Zr-Co alloys for rare-earth-free permanent magnets

B. Balamurugan, B. Das, W. Y. Zhang, R. Skomski, D. J. Sellmyer

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

The structural and magnetic properties of nanostructured Co-rich transition-metal alloys, Co 100-x TM x (TM = Hf, Zr and 10 ≤ x ≤ 18), were investigated. The alloys were prepared under non-equilibrium conditions using cluster-deposition and/or melt-spinning methods. The high-anisotropy HfCo 7 and Zr 2 Co 11 structures were formed for a rather broad composition region as compared to the equilibrium bulk phase diagrams, and exhibit high Curie temperatures of above 750 K. The composition, crystal structure, particle size, and easy-axis distribution were precisely controlled to achieve a substantial coercivity and magnetization in the nanostructured alloys. This translates into high energy products in the range of about 4.3-12.6 MGOe, which are comparable to those of alnico.

Original languageEnglish (US)
Article number064204
JournalJournal of Physics Condensed Matter
Volume26
Issue number6
DOIs
StatePublished - Feb 12 2014

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permanent magnets
Rare earths
Permanent magnets
rare earth elements
Transition metal alloys
Melt spinning
Curie temperature
Coercive force
Chemical analysis
Phase diagrams
Structural properties
Magnetization
Magnetic properties
nonequilibrium conditions
Anisotropy
melt spinning
Crystal structure
Particle size
coercivity
transition metals

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Hf-Co and Zr-Co alloys for rare-earth-free permanent magnets. / Balamurugan, B.; Das, B.; Zhang, W. Y.; Skomski, R.; Sellmyer, D. J.

In: Journal of Physics Condensed Matter, Vol. 26, No. 6, 064204, 12.02.2014.

Research output: Contribution to journalArticle

Balamurugan, B. ; Das, B. ; Zhang, W. Y. ; Skomski, R. ; Sellmyer, D. J. / Hf-Co and Zr-Co alloys for rare-earth-free permanent magnets. In: Journal of Physics Condensed Matter. 2014 ; Vol. 26, No. 6.
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