Magnetic properties of low rare-earth content (Nd = 2 - 7 at.%) α-Fe/Nd2Fe14B type bulk exchange-spring magnets

Hideaki Ono, Tetsuro Tayu, Norihisa Waki, Tatsuo Sugiyama, Munekatsu Shimada, Makoto Kanou, Akira Fujiki, Hiroshi Yamamoto, Keisuke Takasugi, Masato Tani

Research output: Contribution to journalArticle

Abstract

Magnetic properties and structures of low rare-earth content (Nd = 2 - 7 at.%) α-Fe/Nd2Fe14B type Nd-Fe-Ce-V-B system bulk exchange-spring magnets prepared by the Spark Plasma Sintering (SPS) method were investigated. In this range of Nd content, the bulk magnets showed the same magnetic properties as those of the annealed ribbons used as the raw materials. The saturation magnetization and soft/hard phase ratio corresponded with the estimated values. However, the exchange coupling strength decreased conspicuously with a lower Nd content presumably as a result of an increase in the grain size.

Original languageEnglish
Pages (from-to)141-145
Number of pages5
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume49
Issue number2
DOIs
Publication statusPublished - 2002 Feb

Keywords

  • Bulk exchange-spring magnets
  • Low rare-earth content (Nd = 2 - 7 at.%)
  • Magnetic properties
  • Nd-Fe-Co-V-B system alloys
  • Spark Plasma Sintering (SPS) method
  • α-Fe/NdFeB type exchange-spring magnets

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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