Title of article :
Ferrimagnetism in the Heisenberg–Ising bilayer with magnetically non-equivalent planes
Author/Authors :
Balcerzak، نويسنده , , Tadeusz and Sza?owski، نويسنده , , Karol، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2014
Abstract :
The Pair Approximation method is applied to the antiferromagnetic Heisenberg–Ising spin- 1/2 bilayer with a simple cubic crystalline structure. The method allows for self-consistent calculations of thermodynamic quantities, based on the determination of Gibbs free-energy. In the paper the phase diagrams and planar magnetizations are calculated for the system in question. Special attention is paid to the case of magnetically non-equivalent planes, one of which is additionally randomly diluted. The occurrence of a compensation phenomenon is found and the compensation temperature is discussed for such a system. The characteristic concentration of magnetic atoms p ⋆ , below which the compensation phenomenon vanishes, is examined as a function of the Hamiltonian parameters.
Keywords :
Ising–Heisenberg model , Antiferromagnetic bilayer , critical temperature , compensation temperature , Planar magnetization
Journal title :
Physica A Statistical Mechanics and its Applications
Journal title :
Physica A Statistical Mechanics and its Applications