MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Strong Pressure Effect on the Curie Temperature of Itinerant-Electron Metamagnetic La(Fe0.88Si0.12)13Hy and La0.7Ce0.3(Fe0.88Si0.12)13Hy
Shun FujiedaAsaya FujitaKazuaki Fukamichi
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2009 Volume 50 Issue 3 Pages 483-486

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Abstract

The initial pressure shift of the Curie temperature Tc for the first-order transition, dTcdP, for La(Fe0.88Si0.12)13 becomes small after hydrogen absorption. In addition, the hydrogen absorption reduces the ratio of the volume change at Tc to the magnetization squared at Tc, Δω(Tc)⁄M(Tc)F2, suggesting the decrease of the magnetoelastic coupling constant κCmv. On the other hand, dTcdP is enhanced by the partial substitution of Ce for La in connection with the change of the band structure. Consequently, dTcdP of La0.7Ce0.3(Fe0.88Si0.12)13Hy is larger than that of La(Fe0.88Si0.12)13Hy in a wide change of Tc.

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© 2009 The Japan Institute of Metals and Materials
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