Magnetic and structural phase transitions in ferromagnetic MnBi

Yoshifuru Mitsui, Keiichi Koyama, Yuko Nakamori, Shin Ichi Orimo, Kazuo Watanabe

研究成果: Article査読

6 被引用数 (Scopus)

抄録

X-ray powder diffraction, magnetization measurements, and differential thermal analysis (DTA) of polycrystalline MnBi were carried out in zero magnetic field as will as in magnetic fields of up to 14 T and in the temperatures range of 300-773 K, in order to investigate magnetic phase transition. In zero magnetic field, a magnetic phase transition from ferromagnetic to paramagnetic state is exhibited at temperature (T t) of 628 K, accompanied by decomposition. With increasing magnetic field up to 14 T, T t increases linearly with the rate of 2 KT -1. A metamagnetic transition between the paramagnetic and field-induced ferromagnetic states was observed just above T t. The exothermic and endothermic peaks were detected in the magnetic field dependence of DTA signals in the interval of 626-623 K, which relates to the metamagnetic transition. The obtained results are discussed on the basis of a mean field theory.

本文言語English
ページ(範囲)40-45
ページ数6
ジャーナルNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
73
1
DOI
出版ステータスPublished - 2009 1

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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