Ferrimagnetism in the Heisenberg–Ising bilayer with magnetically non-equivalent planes

Tadeusz Balcerzak and Karol Szałowski

Physica A: Statistical Mechanics and its Applications, 2014, vol. 395, issue C, 183-192

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 (search for similar items in EconPapers)
Date: 2014
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:395:y:2014:i:c:p:183-192

DOI: 10.1016/j.physa.2013.10.013

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