Magnetic properties of the half-metallic Heusler alloys Co 2 VAl and Co 2 VGa under pressure

T. Kanomata, Y. Chieda, K. Endo, H. Okada, Makoto Nagasako, K. Kobayashi, Ryosuke Kainuma, Rie Umetsu, H. Takahashi, Y. Furutani, H. Nishihara, Kazutaka Abe, Y. Miura, Masafumi Shirai

研究成果: Article査読

72 被引用数 (Scopus)

抄録

Magnetization measurements have been carried out at high pressure up to 12.1 kbar for Co 2 VAl and Co 2 VGa with a miniature high-pressure clamp cell. The magnetic moment measured at 5 K is independent of pressure for Co 2 VGa. This is an experimental observation that gives clear evidence that Co 2 VGa possesses half-metallic electronic structure. On the other hand, a sizable pressure dependence of the magnetic moment is observed for Co 2 VAl and it is attributed to the precipitation of the bcc particles in the matrix L 2 1 phase. The Curie temperature decreases with increasing pressure for Co 2 VGa, reflecting characteristics typical for usual itinerant electron systems. The negative pressure dependence of the Curie temperature found in Co 2 VGa contrasts fairly with that of other Heusler alloys containing Mn atoms.

本文言語English
論文番号144415
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
82
14
DOI
出版ステータスPublished - 2010 10 7

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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