Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1804651 | Journal of Magnetism and Magnetic Materials | 2007 | 6 Pages |
Abstract
The ground state magnetic properties of a two-sublattice Ising metamegnet in both external longitudinal and transverse fields are studied within the mean-field approach. A parameter α=(Z1J1+Z2J2)/(Z1J1âZ2J2) which reflects the strength ratio of spin coupling in the plane and in adjacent planes is introduced. The ground state energy, the longitudinal staggered magnetization, the longitudinal total magnetization and the transverse total magnetization are calculated. The ground state phase diagrams in Ωâh and Ωâα plane are presented. The results show that when Ω is given, the longitudinal critical magnetic field increases when α decreases; the phase transition changes always from first order to second order with increase in the longitudinal magnetic field h or decrease in α. The reentrant phenomenon occurs in the range α⩽â0.66, Ω⩽0.21, h⩾0.78.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Jing Liu, Guozhu Wei, Hailing Miao,