Critical Point in the Curve of First-Order Magnetic Phase Transition

Cover Page

Cite item

Full Text

Open Access Open Access
Restricted Access Access granted
Restricted Access Subscription or Fee Access

Abstract

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.

About the authors

E. Z Valiev

Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Author for correspondence.
Email: valiev@imp.uran.ru
620108, Yekaterinburg, Russia

References

  1. Ю.А. Изюмов, В.Н. Сыромятников, Фазовые переходы и симметрия кристаллов, Наука, Москва (1984).
  2. A.B. Western, A.G. Baker, C.R. Bacon et al., Phys. Rev.B 17, 4461 (1978).
  3. L. Pytlik and A. Zieba, JMMM 51, 199 (1985).
  4. Э. З. Валиев, ФММ 96, 5 (2003).
  5. Э. З. Валиев, Ф.С. Шеметьев, Письма в ЖЭТФ 79, 535 (2004).
  6. Э. З. Валиев, Ф.С. Шеметьев, ФММ 102, 139 (2006).
  7. T. Sakakibara, T. Tayama, Z. Hiroi et al., Phys.Rev. Lett. 90, 207205 (2003).
  8. Aoki Hidekazu, Tashiro Sakakibara, Kazuyuk Matsuhira et al., J. Phys. Soc. Jpn 73, 2851 (2004).
  9. C. Castelnovo, R. Moessner, and S. L. Sondhi, Nature, 451, 42 (2008).
  10. J. Larrea Jimenez, S.P.G. Crone, E. Fogh et al., Nature 592, 370 (2021).
  11. A. Fujita, K. Fukamishi, M. Yamada et al., J.Appl. Phys. 93, 7263 (2003).
  12. H. Yamada, K. Fukamishi, and T. Goto, Physica B 327, 148 (2003).
  13. C. P. Bean and D. S. Rotbell, Phys.Rev. 1, 104 (1962).
  14. Э. З. Валиев, ЖЭТФ 135, 314 (2009).
  15. A. Fujita, S. Fujieda, Y. Hasegawa, and K. Fukamishi, Phys.Rev.B 65, 0144110 (2001).
  16. A. Fujita, Y. Akamatsu, and K. Fukamishi, J.Appl. Phys. 85, 475 (1999).
  17. A. Fujita, S. Fujieda, Y. Hasegava et al., Phys.Rev.B 67, 104416 (2003).
  18. N. L. Huang and R. Orbach, Phys.Rev.Lett. 12, 275 (1964).
  19. Е. Е. Кокорина, М.В. Медведев, ФММ 122, 1045 (2021).

Supplementary files

Supplementary Files
Action
1. JATS XML
Download

Copyright (c) 2023 Russian Academy of Sciences