Nanocomposite (Nd,Dy)(Fe,Co,Nb,B)5.5/α-Fe multilayer magnets with high performance

W. Liu, Z. D. Zhang, J. P. Liu, Z. R. Dai, Z. L. Wang, X. K. Sun, D. J. Sellmyer

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

The structural and magnetic properties of rare-earth nanocomposite magnets of a (Nd,Dy)(Fe,Co,Nb,B)5.5 single layer and a (Nd,Dy)(Fe,Co,Nb,B)5.5/α-Fe multilayer prepared by sputtering and heat treatment have been investigated. Incomplete exchange coupling behaviour is observed in the Ti-buffered NdDyFeCoNbB + 40 wt%Fe single layer magnet. After annealing, the laminated nanostructure consisting of mutually dispersed soft and hard phases results in remanence enhancement. The optimum magnetic properties of Jr = 1.11 T, μ0iHc = 0.88 T and (BH)max = 192 kJm-3 are achieved in the multilayer magnet annealed at 550°C for 30 min. The designed multilayer film with thinner soft magnetic layers may favour the formation of more ideal nanostructures for exchange coupling between soft- and hard-magnetic phases.

Original languageEnglish (US)
Pages (from-to)L63-L66
JournalJournal of Physics D: Applied Physics
Volume36
Issue number17
DOIs
StatePublished - Sep 7 2003

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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