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

研究成果: ジャーナルへの寄稿記事


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.

ジャーナルScripta Materialia
出版物ステータス出版済み - 3 15 2020


All Science Journal Classification (ASJC) codes

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