Improvement of coercivity of anisotropic Nd-Fe-B HDDR powders by Ga addition

S. Sugimoto, H. Murai, N. Koike, H. Nakamura, D. Book, N. Tezuka, T. Kagotani, M. Okada, M. Homma, K. Inomata

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

The effect of Ga addition on the increase of coercivity of HDDR-treated Nd-Fe-B powders was investigated. The Ga addition suppresses grain growth and may decrease the region where magnetocrystalline anisotropy is reduced. In addition, a heat treatment in which the hydrogen pressure was decreased in steps during the recombination reaction resulted in good magnetic properties of Br = 1.44T, jHc = 0.97MA m-1 and (BH)max = 308 kJm-3.

Original languageEnglish
Pages (from-to)444-446
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume239
Issue number1-3
DOIs
Publication statusPublished - 2002 Feb

Keywords

  • Anisotropy
  • Coercivity
  • Ga addition
  • HDDR
  • Hydrogen pressure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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