Transmission electron microscopy study on the grain boundaries and magnetic domains in Nd-Fe-B based magnets

Kohei Sato, Yasukazu Murakami, Daisuke Shindo, Satoshi Hirosawa, Akira Yasuhara

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The effect of post-sintering heat treatment on the coercivity of Nd-Fe-B based permanent magnets was studied by observing their crystallographic and magnetic microstructures. High-resolution transmission electron microscopy revealed meandering grain boundaries in die as-sintered state, and the smoothness of the boundaries was improved by the post-sintering heat treatment. Electron holography demonstrated that magnetization reversal occurred in a stepwise manner in individual grains in the specimen subjected to the post-sintering heat treatment, whereas reversal was occurred simultaneously in different grains in the as-sintered specimen.

Original languageEnglish
Pages (from-to)333-340
Number of pages8
JournalMaterials Transactions
Volume51
Issue number2
DOIs
Publication statusPublished - Feb 1 2010

Fingerprint

Magnetic domains
magnetic domains
Magnets
sintering
Grain boundaries
heat treatment
magnets
Sintering
grain boundaries
Heat treatment
Transmission electron microscopy
transmission electron microscopy
Electron holography
Magnetization reversal
High resolution transmission electron microscopy
Coercive force
permanent magnets
holography
Permanent magnets
coercivity

All Science Journal Classification (ASJC) codes

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

Cite this

Transmission electron microscopy study on the grain boundaries and magnetic domains in Nd-Fe-B based magnets. / Sato, Kohei; Murakami, Yasukazu; Shindo, Daisuke; Hirosawa, Satoshi; Yasuhara, Akira.

In: Materials Transactions, Vol. 51, No. 2, 01.02.2010, p. 333-340.

Research output: Contribution to journalArticle

Sato, Kohei ; Murakami, Yasukazu ; Shindo, Daisuke ; Hirosawa, Satoshi ; Yasuhara, Akira. / Transmission electron microscopy study on the grain boundaries and magnetic domains in Nd-Fe-B based magnets. In: Materials Transactions. 2010 ; Vol. 51, No. 2. pp. 333-340.
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