Magnetic flux density measurements from grain boundary phase in 0.1 at% Ga-doped Nd–Fe–B sintered magnet

Youngji Cho, Taisuke Sasaki, Ken Harada, Atsuko Sato, Takehiro Tamaoka, Daisuke Shindo, Tadakatsu Ohkubo, Kazuhiro Hono, Yasukazu Murakami

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The magnetism of a narrow (~1.6 nm) grain boundary phase produced in a 0.1 at% Ga-doped Nd–Fe–B sintered magnet was examined using electron holography. The magnetic flux density was determined to be 0.8 ± 0.1 T, which was smaller than that for a commercial magnet free from Ga doping (~1.0 T). The presence of a ferromagnetic grain boundary phase reasonably explained the functionality of the 0.1 at% Ga-doped system, such as the improvement in the squareness of the demagnetization curve. The observations provide useful information for deeper understanding of the coercivity mechanism in Ga-doped Nd–Fe–B sintered magnets.

Original languageEnglish
Pages (from-to)533-538
Number of pages6
JournalScripta Materialia
Volume178
DOIs
Publication statusPublished - Mar 15 2020

All Science Journal Classification (ASJC) codes

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

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