Spin-1 Blume-Capel model with longitudinal random crystal and transverse magnetic fields: A mean-field approach

Albayrak E.

CHINESE PHYSICS B, cilt.22, sa.7, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 22 Sayı: 7
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1088/1674-1056/22/7/077501
  • Dergi Adı: CHINESE PHYSICS B
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: random crystal field, transverse field, spin-1, Blume-Capel model, EMERY-GRIFFITHS MODEL, ONE ISING-MODEL, PHASE-DIAGRAMS, FERROMAGNET, TRANSITION, BEHAVIOR, BONDS
  • Erciyes Üniversitesi Adresli: Evet

Özet

The spin-1 Blume-Capel model with transverse Omega and longitudinal external magnetic fields h, in addition to a longitudinal random crystal field D, is studied in the mean-field approximation. It is assumed that the crystal field is either turned on with probability p or turned off with probability 1 - p on the sites of a square lattice. Phase diagrams are then calculated on the reduced temperature crystal field planes for given values of gamma = Omega/J and p at zero h. Thus, the effect of changing gamma and p are illustrated on the phase diagrams in great detail and interesting results are observed.