Critical behavior of AC antiferromagnetic and ferromagnetic susceptibilities of a spin-1/2 metamagnetic Ising system

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GÜLPINAR G., VATANSEVER E.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, cilt.324, sa.6, ss.983-990, 2012 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 324 Sayı: 6
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1016/j.jmmm.2011.10.004
  • Dergi Adı: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.983-990
  • Anahtar Kelimeler: Irreversible thermodynamics, Staggered magnetic susceptibility, Direct magnetic susceptibility, Metamagnetism, Mean field dynamic critical exponents, DISPLAYING TRICRITICAL BEHAVIOR, HIGH-TEMPERATURE-SERIES, PHASE-TRANSITION POINT, IRREVERSIBLE-PROCESSES, RECIPROCAL RELATIONS, MAGNETIC-RELAXATION, FECL2 METAMAGNET, GLAUBER DYNAMICS, MODEL, FIELD
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

In this study, the temperature variations of the equilibrium and the non-equilibrium antiferromagnetic and ferromagnetic susceptibilities of a metamagnetic system are examined near the critical point. The kinetic equations describing the time dependencies of the total and staggered magnetizations are derived by utilizing linear response theory. In order to obtain dynamic magnetic relaxation behavior of the system, the stationary solutions of the kinetic equations in existence of sinusoidal staggered and physical external magnetic fields are performed. In addition, the static and dynamical mean field critical exponents are calculated in order to formulate the critical behavior of antiferromagnetic and ferromagnetic magnetic response of a metamagnetic system. Finally, a comparison of the findings of this study with previous theoretical and experimental studies is represented and it is shown that a good agreement is found with our results. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.