PHASE-DIAGRAMS AND TRICRITICAL BEHAVIOR OF A DILUTED MIXED SPIN ISING-MODEL IN A RANDOM-FIELD

Authors
KANEYOSHI T
Citation
T. Kaneyoshi, PHASE-DIAGRAMS AND TRICRITICAL BEHAVIOR OF A DILUTED MIXED SPIN ISING-MODEL IN A RANDOM-FIELD, Journal of magnetism and magnetic materials, 151(1-2), 1995, pp. 45-53
Citations number
30
Categorie Soggetti
Material Science","Physics, Condensed Matter
Journal title
Journal of magnetism and magnetic materials → ACNP
ISSN journal
03048853
Volume
151
Issue
1-2
Year of publication
1995
Pages
45 - 53
Database
ISI
SICI code
0304-8853(1995)151:1-2<45:PATBOA>2.0.ZU;2-R
Abstract
A theoretical study of a diluted mixed spin-1/2 and spin-S (S > 1) Isi ng model in a random field is presented on the basis of the effective- field theory. The general formulations for determining the phase diagr am (transition temperature and tricritical point) of the system with a crystal-field interaction are discussed. In particular, the phase dia grams of the system with S = 3/2 are examined in detail on the honeyco mb lattice and some interesting phenomena are found, such as the appea rance of a tricritical point on the honeycomb lattice.