Calculation of magnetocaloric effect with regard for dependence of heat capacity on magnetic field

Autor(en)

Anna Kosogor, Victor A. L’vov

Abstrakt

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.

Organisation(en)

Physik Funktioneller Materialien

Externe Organisation(en)

Institute of Magnetism, Taras Shevchenko National University of Kyiv (KNU)

Journal

Scientific Reports

Band

13

Anzahl der Seiten

7

ISSN

2045-2322

DOI

https://doi.org/10.1038/s41598-023-37272-0

Publikationsdatum

06-2023

Peer-reviewed

Ja

ÖFOS 2012

103017 Magnetismus

ASJC Scopus Sachgebiete

General

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/269bd9c7-785c-40dc-a6c8-48e31355b0d3