Titel
Calculation of magnetocaloric effect with regard for dependence of heat capacity on magnetic field
Autor*in
Victor A. L’vov
Institute of Magnetism NASU and MESU
Abstract
A specific heat of the magnetic solid exhibiting AFM–FM phase transition is computed using the Landau-type theory of phase transitions. The experimentally observed dependence of the specific heat value on the external magnetic field is modelled. It is shown, that this dependence has strong influence on the giant magnetocaloric effect (MCE), which is inherent to the solids exhibiting the phase transitions accompanied by the strong change of magnetization value: the disregard of this dependence leads to the noticeable overestimation of adiabatic temperature change, which is the practically important characteristic of MCE. The temperature change characterizing the giant MCE observed in Fe–Rh alloys is computed. The reasonable agreement between the available experimental data and obtained theoretical results is demonstrated.
Stichwort
Applied physicsMagnetic properties and materialsMaterials sciencePhase transitions and critical phenomena
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
phaidra.univie.ac.at/o:2065833
Erschienen in
Titel
Scientific Reports
Band
13
ISSN
2045-2322
Erscheinungsdatum
2023
Publication
Springer Science and Business Media LLC
Erscheinungsdatum
2023
Zugänglichkeit
Rechte
Rechteangabe
© The Author(s) 2023
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