Large Isothermal Magnetic Entropy Change after Hydrogen Absorption into La0.5Pr0.5(Fe0.88Si0.12)13

S. Fujieda; A. Fujita; Kazuaki Fukamichi

doi:10.4028/www.scientific.net/AMR.26-28.577

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 26-28Large Isothermal Magnetic Entropy Change after...

Large Isothermal Magnetic Entropy Change after Hydrogen Absorption into La_0.5Pr_0.5(Fe_0.88Si_0.12)₁₃

Abstract:

The influences of hydrogen absorption on the Curie temperature TC and the isothermal magnetic entropy change for La0.5Pr0.5(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(Fe0.88Si0.12)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 ,Sm MAX is slightly decreased by hydrogen absorption. However, ,Sm MAX = -26 J/kg K in a magnetic field change of 5 T for La0.5Pr0.5(Fe0.88Si0.12)13H1.6 is still larger than the value of -23 J / kg K for La(Fe0.88Si0.12)13H1.5 having almost the same value of TC. Consequently, ,Sm MAX of the La0.5Pr0.5(Fe0.88Si0.12)13Hy is larger than that of La(Fe0.88Si0.12)13Hy in a wide temperature range covering room temperature.

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Advanced Materials Research (Volumes 26-28)

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577-580

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.26-28.577

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Online since:

October 2007

Authors:

S. Fujieda, A. Fujita, Kazuaki Fukamichi

Keywords:

Curie Temperature, Hydrogen Absorption, Itinerant-Electron Metamagnetic Transition, Magnetic Refrigerant, Magnetocaloric Effect

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References

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