Large magnetocaloric effects and thermal transport properties of La(FeSi)13 and their hydrides

K. Fukamichi, A. Fujita, Shun Fujieda

Research output: Contribution to journalConference articlepeer-review

70 Citations (Scopus)

Abstract

La(FexSi1-x)13 exhibit an itinerant-electron metamagnetic (IEM) transition at relatively low applied magnetic fields just above the Curie temperature TC. Large magnetocaloric effects (MCEs) in terms of the isothermal temperature change ΔSm and the adiabatic temperature change ΔTad are followed by the IEM transition. The MCEs increase, while TC decreases with increasing Fe concentration. Therefore, TC of these compounds should be controlled up to room temperature from the viewpoint of practical applications. The working temperature as magnetic refrigerants is extended from about 185 to 330 K by adjusting hydrogen concentration. After hydrogen absorption, the MCEs as well as the thermal conductivity of La(Fe xSi1-x)13 and their hydrides exhibit excellent characteristics in the temperature range mentioned above. Consequently, the present compounds are one of the promising candidates for magnetic refrigerants working in a wide temperature range covering room temperature.

Original languageEnglish
Pages (from-to)307-312
Number of pages6
JournalJournal of Alloys and Compounds
Volume408-412
DOIs
Publication statusPublished - 2006 Feb 9
EventProceedings of the Rare Earths'04 in Nara, Japan -
Duration: 2004 Nov 72004 Nov 12

Keywords

  • Itinerant-electron metamagnetic (IEM)
  • Magnetocaloric effects (MCEs)
  • Room temperature

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Large magnetocaloric effects and thermal transport properties of La(FeSi)<sub>13</sub> and their hydrides'. Together they form a unique fingerprint.

Cite this