The Magnetocaloric Effect and Magnetic Transitions in Hydride Compounds: GdNiH3.2 and TbNiH3.4

A.I. Smarzhevskaya; S.A. Nikitin; Viktor N. Verbetsky; Wacław Iwasieczko; Alexey N. Golovanov

doi:10.4028/www.scientific.net/SSP.233-234.243

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The Magnetocaloric Effect and Magnetic Transitions in Hydride Compounds: GdNiH_3.2 and TbNiH_3.4

Abstract:

The paper presents the investigation of GdNiH_3.2 and TbNiH_3.4 hydrides magnetic transitions and magnetocaloric properties. The isothermal magnetization data in the fields up to 5T are obtained for GdNi and TbNi compounds and their hydrides and the values of magnetic entropy change are calculated. The maximum values of magnetic entropy change ΔS_M in GdNiH_3.2 and TbNiH_3.4 are extremely large. It is shown that the hydrogenation shifts ΔS_M(T) maximum to lower temperatures.