Abstract
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.
Original language | English |
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Pages (from-to) | 147-150 |
Number of pages | 4 |
Journal | Journal of Alloys and Compounds |
Volume | 408-412 |
DOIs | |
Publication status | Published - 2006 Feb 9 |
Event | Proceedings of the Rare Earths'04 in Nara, Japan - Duration: 2004 Nov 7 → 2004 Nov 12 |
Keywords
- Band magnetism
- High-pressure synthesis
- Pressure effect
- Spin wave
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry