Thickness dependent Curie temperature and power-law behavior of layering transitions in ferromagnetic classical and quantum thin films described by Ising, XY and Heisenberg models

YÜKSEL Y., AKINCI Ü.

Physica B: Condensed Matter, cilt.462, ss.54-58, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 462
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1016/j.physb.2015.01.019
  • Dergi Adı: Physica B: Condensed Matter
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.54-58
  • Anahtar Kelimeler: Effective field theory, Ferromagnetism, Shift exponent, Surface magnetism, EFFECTIVE-FIELD-THEORY, FINITE-SIZE, MAGNETIC-PROPERTIES, PHASE-TRANSITIONS, SURFACE MAGNETISM, MONTE-CARLO, ANISOTROPY, CROSSOVER, DIAGRAM
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

© 2015 Elsevier B.V. All rights reserved.Ferromagnetic-paramagnetic phase transitions in classical and quantum thin films have been studied up to 50 mono-layers using effective field theory with two-site cluster approximation. Variation of the Curie temperature as a function of film thickness has been examined. The relative shift of the Curie temperature from the corresponding bulk value has been investigated in terms of the shift exponent λ. We have found that shift exponent λ clearly depends on the strength of the ferromagnetic exchange coupling of the surface. Moreover, we have not observed any significant difference between classical and quantum exponents for a particular model.