Effect of annealing on nanostructure and magnetic properties of Zr 2Co11 material

W. Y. Zhang, X. Z. Li, S. Valloppilly, R. Skomski, D. J. Sellmyer

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Single-phase Zr2Co11 nanomagnetic materials with high coercivity have been fabricated by melt spinning with subsequent annealing under Ar, N2, and vaccum. Annealing coarsens the grains and decreases the density of defects, leading to intergrain decoupling action and the enhancement of the magnetocrystalline anisotropy field of the hard magnetic phase. Therefore, coercivity increases 44.7% from 6.7 kOe for the as-spun to 9.7 kOe for the annealed which is the highest among Zr-Co alloys so far. The results show that the magnetic-hardening mechanism is primarily dominated by domain-wall pinning. In addition, annealing clearly increases the saturation magnetization. The above results indicate that Zr2Co11 has potential for fabricating rare-earth-free permanent-magnet nanocomposites.

Original languageEnglish (US)
Pages (from-to)64-67
Number of pages4
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume186
Issue number1
DOIs
StatePublished - Aug 1 2014

Fingerprint

Nanostructures
Magnetic properties
Annealing
magnetic properties
Coercive force
annealing
coercivity
Nanomagnetics
Magnetocrystalline anisotropy
melt spinning
Melt spinning
Domain walls
Saturation magnetization
permanent magnets
hardening
decoupling
Rare earths
Permanent magnets
domain wall
Hardening

Keywords

  • Annealing
  • Coercivity
  • Magnetic-hardening
  • Nanostructure

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Effect of annealing on nanostructure and magnetic properties of Zr 2Co11 material. / Zhang, W. Y.; Li, X. Z.; Valloppilly, S.; Skomski, R.; Sellmyer, D. J.

In: Materials Science and Engineering B: Solid-State Materials for Advanced Technology, Vol. 186, No. 1, 01.08.2014, p. 64-67.

Research output: Contribution to journalArticle

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AB - Single-phase Zr2Co11 nanomagnetic materials with high coercivity have been fabricated by melt spinning with subsequent annealing under Ar, N2, and vaccum. Annealing coarsens the grains and decreases the density of defects, leading to intergrain decoupling action and the enhancement of the magnetocrystalline anisotropy field of the hard magnetic phase. Therefore, coercivity increases 44.7% from 6.7 kOe for the as-spun to 9.7 kOe for the annealed which is the highest among Zr-Co alloys so far. The results show that the magnetic-hardening mechanism is primarily dominated by domain-wall pinning. In addition, annealing clearly increases the saturation magnetization. The above results indicate that Zr2Co11 has potential for fabricating rare-earth-free permanent-magnet nanocomposites.

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