Magnetic and magnetothermodynamic properties of Ho5Si4

TitleMagnetic and magnetothermodynamic properties of Ho5Si4
Publication TypeJournal Article
Year of Publication2010
AuthorsSingh NK, Paudyal D, Pecharsky VK, Gschneidner KA
Journal TitleJournal of Applied Physics
Volume107
Pages09a921
Date Published05/01
ISBN Number0021-8979
Accession NumberISI:000277834300126
Keywordsintermetallics
Abstract

The magnetic and magnetocaloric properties of Ho5Si4 have been investigated. The compound undergoes a second order ferromagnetic transition at 76 K (T-C) and a spin reorientation transition at about 15 K. The temperature dependencies of heat capacity data measured in various magnetic fields corroborate the second order ferromagnetic character of the transition at T-C. For a field change (Delta H) of 50 kOe, the maximum values of isothermal magnetic entropy change (Delta S-M) and adiabatic temperature change (Delta T-ad) are -14.8 J kg(-1) K-1 (114 mJ/cm(3) K) and 6.1 K, respectively. From the first principles calculations the T-C of Ho5Si4 is estimated to be 78 K and the maximum value of Delta S-M is estimated to be -12.6 J kg(-1) K-1 for Delta H= 50 kOe. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3365515]

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