Enviar artigo por via de e-mail Kriticheskaya tochka na krivoy magnitnykh fazovykh perekhodov pervogo roda
- Autores: Valiev E.1
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Afiliações:
- Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
- Edição: Volume 163, Nº 3 (2023)
- Páginas: 344-349
- Seção: Articles
- URL: https://journals.rcsi.science/0044-4510/article/view/145271
- DOI: https://doi.org/10.31857/S0044451023030057
- EDN: https://elibrary.ru/QDXELD
- ID: 145271
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Resumo
A magnetic state diagram for ferromagnets exhibiting a first-order phase transition in a magnetic field has been calculated. Calculations have been made using the exchange-striction model of a ferromagnet. It has been shown that the curve of first-order magnetic phase transition ends up at a critical point (Hcr, Tcr) that is similar to the critical point of the liquid–gas transition on the (T, P) plane. Analytical expressions for thermodynamic quantities, namely, magnetic susceptibility, specific heat, and compressibility, which anomalously grow near the critical point, have been derived. Calculation results have been compared with available experimental data for La(Fe0.88Si0.12)13 ferromagnet, which experiences the first-order magnetic phase transition.
Sobre autores
E. Valiev
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Autor responsável pela correspondência
Email: valiev@imp.uran.ru
620108, Yekaterinburg, Russia
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