Related Experiment Video
Updated: Jul 26, 2025

Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment
Published on: July 5, 2024
Calculation of magnetocaloric effect with regard for dependence of heat capacity on magnetic field
Anna Kosogor1,2, Victor A L'vov3,4
1Institute of Magnetism NASU and MESU, Kyiv, 03142, Ukraine. annakosogor@gmail.com.
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.
Related Concept Videos
Magnetic Susceptibility and Permeability
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
Paramagnetism
Energy In A Magnetic Field
Take an ideal inductor with zero resistance. Although it's practically impossible, assume that the coil's resistance is so small that it is practically negligible. The loss of the field's energy to dissipate thermal energy (or heat) is thus...
Potential Due to a Magnetized Object
The vector...
Induced Electric Fields: Applications
Ferromagnetism

