Frequency dependence of the complex susceptibility for a spin-1 Ising model

Erdem R.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, cilt.321, sa.17, ss.2592-2595, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 321 Sayı: 17
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1016/j.jmmm.2009.03.042
  • Dergi Adı: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2592-2595
  • Anahtar Kelimeler: Complex susceptibility, Frequency dependence, Argand diagram, Spin-1 Ising model, Onsager theory, PHASE-TRANSITION POINT, EMERY-GRIFFITHS MODEL, DYNAMIC SUSCEPTIBILITY, RELAXATION PHENOMENA, IRREVERSIBLE-PROCESSES, RECIPROCAL RELATIONS, MAGNETIC-RELAXATION, UNSTABLE SOLUTIONS, SYSTEM, DISPERSION
  • Akdeniz Üniversitesi Adresli: Hayır

Özet

l The complex susceptibility or the dynamic susceptibility (chi(omega) = chi'(omega)-i chi ''(omega)) for a spin-1 Ising system with bilinear and biquadratic interactions is obtained on the basis of Onsager theory of irreversible processes. If the logarithm of the susceptibilities is plotted as a function of the logarithm of frequency, then the real part (chi') displays a sequence of plateau regions and the imaginary part (chi '') has a sequence of maxima in the ordered or ferromagnetic phase. On the other hand, only one plateau region in chi' and one maximum in chi '' is observed in the disordered or paramagnetic phase. Argand or Cole-Cole plots(chi ''-chi') for a selection of temperatures are also shown, and a sequence of semicircles is illustrated in the ordered phase and only one semicircle for the disordered phase in these plots. (C) 2009 Elsevier B.V. All rights reserved.