Re-entrant ferromagnetism in 2D and 3D Ising model with random nearest-neighbour interactions

Author

Toth, Lubomir ; Tothova, M.

Author_Institution

Dept. of Theor. Phys. & Geophys., Safarik (P.J.) Univ., Kosice, Czechoslovakia

Volume

30

Issue

2

fYear

1994

fDate

3/1/1994 12:00:00 AM

Firstpage

887

Lastpage

889

Abstract

We present the study of phase diagrams in spin-1/2 Ising model for honeycomb, square, triangular and simple-cubic lattices using the two-spin cluster approximation. We consider nearest-neighbour ferromagnetic exchange interactions J with concentration p and exchange interactions αJ (|α|<1) with concentration (1-p). The phase diagrams in α-t_c^-1 plane show re-entrant behavior in certain ranges of concentration p

Keywords

Ising model; cluster approximation; exchange interactions (electron); ferromagnetic properties of substances; ferromagnetism; magnetic impurity interactions; magnetic transitions; Ising model; honeycomb; nearest-neighbour ferromagnetic exchange interactions; phase diagrams; random nearest-neighbour interactions; re-entrant ferromagnetism; simple-cubic lattices; square; triangular; two-spin cluster approximation; Antiferromagnetic materials; Approximation methods; Elementary particle exchange interactions; Equations; Geophysics; Impurities; Lattices; Physics; Random variables; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.312436

Filename

312436