Ferromagnetism of (ScCa)Co2 Laves phase compound synthesized under high pressure

M. Ohta, M. Okada, H. Kakuta, Asaya Fujita, K. Fukamichi, Atsunori Kamegawa, H. Takamura

研究成果: Conference article

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The appearance of ferromagnetism in (Sc0.85Ca 0.15)Co2 Laves phase synthesized under high pressure of 6 GPa was confirmed. A magnetically homogeneous state was achieved by applying pressure of 6 GPa in 1373 K for 48 h. This is the first study that confirmed a stable ferromagnetic state in exchange-enhanced Pauli paramagnet ScCo 2-based compound system. The quantities of pressure P and magnetization M dependence of the Curie temperature TC, dln T C/dP and (dln TC/dP)/(dln M/dP) = dln TC/dln M for (Sc0.85Ca0.15)Co2 are smaller than those for Lu(Co1 - xAlx)2 compounds, and accordingly the magnetic moment of (Sc0.85Ca0.15)Co2 is stiffer against pressure. The ratio of the spin wave stiffness constant D s to TC, Ds/TC, in (Sc 0.85Ca0.15)Co2 is smaller than that of Lu(Co1 - xAlx)2, implying that the spin wave in (Sc0.85Ca0.15)Co2 spread over wider wavevector space.

ジャーナルJournal of Alloys and Compounds
出版物ステータスPublished - 2006 2 9
イベントProceedings of the Rare Earths'04 in Nara, Japan -
継続期間: 2004 11 72004 11 12

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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