Title of article
Entropy change at magnetic phase transitions of the first order and second order
Author/Authors
Basso، نويسنده , , Vittorio and Sasso، نويسنده , , Carlo P. and Küpferling، نويسنده , , Michaela، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2014
Pages
9
From page
257
To page
265
Abstract
Magnetocaloric properties close to first order and second order phase transitions are presented and discussed. The specific heat capacity as a function of the magnetic field and the magnetic field induced entropy change has been measured by direct heat flux calorimetry in Gd, hydrogenated La(Fe–Mn–Si)13, La(Fe–Co–Si)13 and the Heusler alloy Ni–Mn–Co–Sn. The resulting s(Ha,T) entropy constitutive relation is compared with a model including the ferromagnetic, electronic and structural contributions to the free energy.
Keywords
magnetocaloric effect , gD , Heusler alloy Ni–Mn–Co–Sn , La(Fe–Si)13 , Mean field theory , Effet magnétocalorique , gD , La(Fe–Si)13 , Alliage de Heusler Ni–Mn–Co–Sn , Théorie du champ moyen
Journal title
International Journal of Refrigeration
Serial Year
2014
Journal title
International Journal of Refrigeration
Record number
1345759
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