Influence of hydrogenation on volume dependence of the Curie temperature and entropy change in La(Fe0.86Si0.14)13

Asaya Fujita, S. Fujieda, K. Fukamichi

研究成果: Conference article査読

2 被引用数 (Scopus)

抄録

To elucidate the influence of hydrogenation on the volume dependence of the Curie temperature TC and the entropy change ΔSm in La(Fe0.86Si0.14)13, magnetic properties under hydrostatic pressure have been investigated. In the thermomagnetization curves of La(Fe0.86Si0.14)13H1.1, the first-order phase transition becomes clearer due to the decrease of volume, as observed before hydrogenation. By hydrogenation, the reduction of the pressure dependence of TC by about 20% is caused by the magnetovolume contribution to the free energy. Meanwhile, the maximum value of ΔS m is increased in magnitude from -9 to -18 J/kgK by applying pressure of 1 GPa. Accordingly, the decrease of volume is also effective to enhance ΔSm after hydrogenation.

本文言語English
論文番号092006
ジャーナルJournal of Physics: Conference Series
200
SECTION 9
DOI
出版ステータスPublished - 2010

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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