The influence of interplanar coupling on the entropy and specific heat of the bilayer ferromagnet

Abstract

The Pair Approximation method is applied to studies of the magnetic Ising-Heisenberg bilayer with simple cubic structure and spin $S=1/2$. The method allows to take into account quantum effects related to Heisenberg couplings. In the paper the entropy and magnetic contribution to the specific heat are calculated. A special attention is paid to the case when the planes are magnetically non-equivalent and the interplanar coupling is relatively weak. A double peak structure in the temperature dependence of the specific heat and the entropy change in the external field is found. When the system is strongly anisotropic (the case of Ising couplings) the Exact Calculations for Finite Cluster are performed for comparison with the Pair Approximation method.

References in corpus (11)

• Magnetocaloric effect in one-dimensional antiferromagnets
• Magnetocaloric effect in the frustrated square lattice J1-J2 model
• Magnetocaloric effect in quantum spin-s chains
• Magnetocaloric effect in two-dimensional spin-1/2 antiferromagnets
• Critical exponents of the two-layer Ising model
• Nature of phase transition in magnetic thin films
• Thermodynamic properties of a diluted Heisenberg ferromagnet with interaction anisotropy -- magnetocaloric point of view
• Critical Temperature Studies of the Anisotropic Bi- and Multilayer Heisenberg Ferromagnets in Pair Approximation
• Magneto-thermal properties of the spin-s Heisenberg antiferromagnet on the cuboctahedron
• Phenomenological renormalizaiton group approach to the anisotropic two-layer Ising model
• Magnetocaloric effect in integrable spin-s chains

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• Monte Carlo simulations of an Ising bilayer with non-equivalent planes
• Ferrimagnetism in the Heisenberg-Ising Bilayer with Magnetically Non-equivalent Planes
• Compensation temperature in spin-$1/2$ Ising trilayers: A Monte Carlo study
• Monte Carlo study of an anisotropic Ising multilayer with antiferromagnetic interlayer couplings
• Critical behavior of a triangular lattice Ising AF/FM bilayer
• Anisotropic Heisenberg Model in Thin Film Geometry
• Random Field Distributed Heisenberg Model on a Thin Film Geometry
• Ising versus Potts criticality in a low-temperature magnetothermodynamics of a frustrated spin-1/2 Heisenberg triangular bilayer
• The dynamic magnetic behaviors of the Blume-Capel Ising bilayer system
• Ordering phenomena in a heterostructure of frustrated and unfrustrated triangular-lattice Ising layers
• Critical temperature of site-diluted spin-1/2 systems with long-range ferromagnetic interactions
• The Widom line in the Ising model on a decorated bilayer lattice