The influence of the different transverse fields on the critical properties in the mixed Ising spin system with single-ion anisotropy
CCAST (World Laboratory), P.O.Box 8730, Beijing 100080, P.R. China
2 Department of Physics, Suzhou University, Suzhou 215006, P.R. China
Revised: 9 August 1999
Published online: 15 February 2000
The effects of single-ion anisotropy and different sublattice transverse fields on the critical properties of the mixed Ising spin system on the square lattice are investigated within the framework of an effective field approximation. For certain values of the system parameters, tricritical points and reentrant phenomena can be observed, due to the competition between the different transverse fields and single-ion anisotropy. We present a detailed description of the phase diagram.
PACS: 75.10.Jm – Quantized spin models / 75.40.Cx – Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.) / 75.50.Cc – Other ferromagnetic metals and alloys
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000