Entropy change at magnetic phase transitions of the first order and second order / Vittorio Basso in International journal of refrigeration, Vol. 37 N° 1 (Janvier 2014)  

Public ISBD [article]  inInternational journal of refrigeration > Vol. 37 N° 1 (Janvier 2014) . - pp. 257-265 Titre : Entropy change at magnetic phase transitions of the first order and second order Titre original : Changement d'entropie et transitions de la phase magnétique de premier et de second ordre Type de document : texte imprimé Auteurs : Vittorio Basso, Auteur ; Carlo P. Sasso, Auteur ; Michaela Küpferling, Auteur Année de publication : 2014 Article en page(s) : pp. 257-265 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Magnetocaloric effect  Gd  La(Fe–Si)13  Heusler alloy Ni–Mn–Co–Sn  mean field theory Résumé : 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. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713001990 [article] Entropy change at magnetic phase transitions of the first order and second order = Changement d'entropie et transitions de la phase magnétique de premier et de second ordre [texte imprimé] / Vittorio Basso, Auteur ; Carlo P. Sasso, Auteur ; Michaela Küpferling, Auteur . - 2014 . - pp. 257-265. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 37 N° 1 (Janvier 2014) . - pp. 257-265 Mots-clés : Magnetocaloric effect  Gd  La(Fe–Si)13  Heusler alloy Ni–Mn–Co–Sn  mean field theory Résumé : 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. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713001990

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