Large isothermal magnetic entropy change after hydrogen absorption into la0.5Pr0.5(Fe0.88Si0.12) 13

S. Fujieda, Asaya Fujita, K. Fukamichi

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

The influences of hydrogen absorption on the Curie temperature T c and the isothermal magnetic entropy change for La 0.5Pr0.5(Fe0.88Si0.12)13 have been investigated, because the magnetocaloric effects have been confirmed to be enhanced after a partial substitution of Pr for La in La(Fe 0.88Si0.12)13. The value of Tc for La0.5Pr0.5(Fe0.88Si0.12) 13Hy increases from 185 to 324 K with increasing y from 0 to 1.6. The maximum value of the isothermal magnetic entropy change ΔSmMAX is slightly decreased by hydrogen absorption. However, ΔSmMAX = -26 J/kg K in a magnetic field change of 5 T for La0.5Pr0.5(Fe0.88Si 0.12)13H1.6 is still larger than the value of -23 J/kg K for La(Fe0.88Si0.12)13H 1.5 having almost the same value of Tc. Consequently, ΔSmMAX of the La0.5Pr 0.5(Fe0.88Si0.12)13Hy is larger than that of La(Fe0.88Si0.12)13H y in a wide temperature range covering room temperature.

Original languageEnglish
Pages (from-to)577-580
Number of pages4
JournalAdvanced Materials Research
Volume24-25
DOIs
Publication statusPublished - 2007
EventPRICM 6: The 6th Pacific Rim International Conference on Advanced Materials and Processing - Jeju Island, Korea, Republic of
Duration: 2007 Nov 52007 Nov 9

Keywords

  • Curie temperature
  • Hydrogen absorption
  • Itinerant-electron metamagnetic transition
  • Magnetic refrigerant
  • Magnetocaloric effect

ASJC Scopus subject areas

  • Engineering(all)

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