57 citations · 643 across the 43 of their papers we have counts for
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The Pair Approximation method for the ferromagnetic Heisenberg model with spin and arbitrary range of interactions. Application for the magnetic semiconductor CrIAs
T. Balcerzak, K. Szałowski
The Pair Approximation method has been formulated for the isotropic ferromagnetic Heisenberg model with spin . The exchange interactions of arbitrary range have been taken int…
Thermodynamic properties of the one-dimensional Ising model with magnetoelastic interaction
T. Balcerzak, K. Szałowski, M. Jaščur
The Ising one-dimensional (1D) chain with spin and magnetoelastic interactions is studied with the lattice contribution included in the form of elastic interaction and ther…
Hubbard pair cluster with elastic interactions. Studies of thermal expansion, magnetostriction and electrostriction
T. Balcerzak, K. Szałowski
The pair cluster (dimer) is studied within the framework of the extended Hubbard model and the grand canonical ensemble. The elastic interatomic interactions and thermal vibrationa…
Spin-glass-like ordering in a frustrated Ising antiferromagnet on a honeycomb lattice
M. Žukovič, M. Borovský, A. Bobák +2
We study the nature of a low-temperature phase in the frustrated honeycomb-lattice Ising model with first- and second-neighbor antiferromagnetic (AF) interactions, and ,…
Phase Diagram of the - Frustrated Anisotropic Antiferromagnet with Spin on the Quadratic Lattice
T. Balcerzak, K. Szałowski, A. Bobák +1
In the paper the phase diagram of frustrated antiferromagnet with spin and single-ion anisotropy is studied on the planar quadratic lattice in the cluster approxima…
Hubbard pair cluster in the external fields. Studies of the magnetic properties
T. Balcerzak, K. Szałowski
The magnetic properties of the two-site Hubbard cluster (dimer or pair), embedded in the external electric and magnetic fields and treated as the open system, are studied by means…
Thermodynamic model of a solid with RKKY interaction and magnetoelastic coupling
T. Balcerzak, K. Szałowski, M. Jaščur
Thermodynamic description of a model system with magnetoelastic coupling is presented. The elastic, vibrational, electronic and magnetic energy contributions are taken into account…
Ground-state magnetic properties of spin ladder-shaped quantum nanomagnet: Exact diagonalization study
K. Szałowski, P. Kowalewska
The paper presents a computational study of the ground-state properties of a quantum nanomagnet possessing the shape of a finite two-legged ladder composed of 12 spins . The…
Thermodynamics of a model solid with magnetoelastic coupling
K. Szałowski, T. Balcerzak, M. Jaščur
In the paper a study of a model magnetoelastic solid system is presented. The system of interest is a mean-field magnet with nearest-neighbour ferromagnetic interactions and the un…
Hubbard pair cluster in the external fields. Studies of the chemical potential
T. Balcerzak, K. Szałowski
The chemical potential of the two-site Hubbard cluster (pair) embedded in the external electric and magnetic fields is studied by exact diagonalization of the Hamiltonian. The form…
Self-consistent model of a solid for the description of lattice and magnetic properties
T. Balcerzak, K. Szałowski, M. Jaščur
In the paper a self-consistent theoretical description of the lattice and magnetic properties of a model system with magnetoelastic interaction is presented. The dependence of magn…
Exact Diagonalization Study of an Extended Hubbard Model for a Cubic Cluster at Quarter Filling
K. Szałowski, T. Balcerzak, M. Jaščur +2
In the paper the thermodynamics of a cubic cluster with 8 sites at quarter filling is characterized by means of exact diagonalization technique. Particular emphasis is put on the b…
Frustration in an exactly solvable mixed-spin Ising model with bilinear and three-site four-spin interactions on a decorated square lattice
M. Jaščur, V. Štubňa, K. Szałowski +1
Competitive effects of so-called three-site four-spin interactions, single ion anisotropy and bilinear interactions is studied in the mixed spin-1/2 and spin-1 Ising model on a dec…
A self-consistent thermodynamic model of metallic systems. Application for the description of gold
Tadeusz Balcerzak, Karol Szałowski, Michal Jaščur
A self-consistent thermodynamic model of metallic system is presented. The expression for the Gibbs energy is derived, which incorporates elastic (static) energy, vibrational energ…
Thermodynamic description of the Ising antiferromagnet on triangular lattice with selective dilution by modified Pair Approximation method
T. Balcerzak, K. Szałowski, M. Jaščur +3
The Pair Approximation method is modified in order to describe the systems with geometrical frustration. The Ising antiferromagnet on triangular lattice with selective dilution (Ka…
Critical temperature of site-diluted spin-1/2 systems with long-range ferromagnetic interactions
Karol Szałowski, Tadeusz Balcerzak
In the paper the Pair Approximation (PA) method for studies of the site-diluted spin-1/2 systems of arbitrary dimensionality with the long-range ferromagnetic interactions is adopt…
The influence of interplanar coupling on the entropy and specific heat of the bilayer ferromagnet
Karol Szałowski, Tadeusz Balcerzak
The Pair Approximation method is applied to studies of the magnetic Ising-Heisenberg bilayer with simple cubic structure and spin . The method allows to take into account qu…
A simple thermodynamic description of the combined Einstein and elastic models
Tadeusz Balcerzak, Karol Szałowski, Michal Jaščur
Simple application of the Einstein model combined with the elastic description of solid state is developed. The frequency of quantum oscillators has been assumed as volume dependen…
Thermodynamic properties of a diluted Heisenberg ferromagnet with interaction anisotropy -- magnetocaloric point of view
Karol Szałowski, Tadeusz Balcerzak, Andrej Bobák
The thermodynamics of a site-diluted ferromagnetic Heisenberg model for spin with interaction anisotropy in spin space is investigated. The study is aimed at presenting the…
Critical Temperature Studies of the Anisotropic Bi- and Multilayer Heisenberg Ferromagnets in Pair Approximation
Karol Szałowski, Tadeusz Balcerzak
The Pair Approximation method is applied to studies of the bilayer and multilayer magnetic systems with simple cubic structure. The method allows to take into account quantum effec…
Study of planar Ising ferromagnet on the triangular lattice with selective dilution
T. Balcerzak, K. Szałowski, M. Žukovič +3
In the paper the Curie temperatures of selectively diluted planar Ising ferromagnet on the triangular lattice are calculated vs. concentration of magnetic atoms. Various analytical…
The influence of structural short-range order on the phase diagrams of diluted FCC magnet with arbitrary spin and modified RKKY interaction
Karol Szałowski, Tadeusz Balcerzak
A diluted FCC magnet with modified long-range RKKY interaction and arbitrary Ising spin S is considered within two-sublattice model. In the molecular field approximation the Gibbs…