Research output: Contribution to journal › Article › peer-review
Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Magnetocaloric Effect and Phase Separation: Theory and Prospects
AU - Igoshev, P. A.
N1 - This work was carried out as part of the state assignment “Kvant” no. 122021000038-7 and was supported by the Ministry of Science and Higher Education of the Russian Federation as part of the Development Program of the Ural Federal University within the strategic academic leadership program “Priority-2030.” The calculations were performed on the supercomputer “Uran” of the Institute of Mathematics and Mechanics, Ural Branch, Russian Academy of Sciences.
PY - 2023/11/1
Y1 - 2023/11/1
N2 - The paper considers the influence of magnetic phase separation on the magnitude of the magnetocaloric effect. A general thermodynamic generalized Landau’s theory with a variable number of particles is proposed, which allows a simple and consistent description of the first-order phase transition between magnetically ordered and disordered phases, considering phase separation. The calculation of the magnetic susceptibility and entropy of the phases involved in phase separation is considered. It is shown that the magnetic susceptibility of the magnetically ordered (disordered) phase involved in phase separation is negative (positive) in the vicinity of the tricritical point, which can lead to an inversion of the sign of the magnetocaloric effect.
AB - The paper considers the influence of magnetic phase separation on the magnitude of the magnetocaloric effect. A general thermodynamic generalized Landau’s theory with a variable number of particles is proposed, which allows a simple and consistent description of the first-order phase transition between magnetically ordered and disordered phases, considering phase separation. The calculation of the magnetic susceptibility and entropy of the phases involved in phase separation is considered. It is shown that the magnetic susceptibility of the magnetically ordered (disordered) phase involved in phase separation is negative (positive) in the vicinity of the tricritical point, which can lead to an inversion of the sign of the magnetocaloric effect.
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UR - https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=tsmetrics&SrcApp=tsm_test&DestApp=WOS_CPL&DestLinkType=FullRecord&KeyUT=001153639300006
U2 - 10.1134/S0031918X23602147
DO - 10.1134/S0031918X23602147
M3 - Article
VL - 124
SP - 1112
EP - 1120
JO - Physics of Metals and Metallography
JF - Physics of Metals and Metallography
SN - 0031-918X
IS - 11
ER -
ID: 52297324