Random field distributed Heisenberg model on a thin film geometry

Abstract

The effects of the bimodal random field distribution on the thermal and magnetic properties of of the Heisenberg thin film have been investigated by making use of a two spin cluster with the decoupling approximation. Particular attention has been devoted to the obtaining of phase diagrams and magnetization behaviors. The physical behaviors of special as well as tricritical points are discussed for a wide range of selected Hamiltonian parameters. For example, it is found that when the strength of magnetic field increases, the locations of special point in related plane decrease. Moreover, tricritical behavior has been obtained for the higher values of the magnetic field, and influences of the varying Hamiltonian parameters on its behavior have been elucidated in detail in order to have a better understanding of mechanism underlying of the considered system.

Thickness dependent Curie temperature and power-law behavior of layering transitions in ferromagnetic classical and quantum thin films described by Ising, XY and Heisenberg models

“…Hence, the theoretical investigation of magnetism in these systems require more realistic models. In this context, Heisenberg model on thin film geometry has been studied by a wide variety of methods such as renormalization group (RG) method [12], high temperature series expansions (HTSE) [13,14,15,16,17], density functional theory (DFT) [18], EFT [19,20,21,22,23,24,25,26,27], MFT [28,29,30], and Green functions formalism (GFF) [31,32,33,34,35]. EFT method which is superior to conventional MFT is widely used in the literature.…”

Investigation of stabilization and survival of skyrmion vortices in the presence of magnetic field disorder in two-dimensional lattices: a case study for Janus dichalcogenides

“…It is also a crucial task to understand and clarify the influence of randomness on the stabilization of the skyrmion phase in ML magnets exhibiting the lack of inversion symmetry for the spintronic systems which have potential in practical applications. To the best of our knowledge, the magnetic properties of 2D FM lattices with random disorders have been scarcely studied in the literature [53][54][55][56][57][58][59][60][61]. Moreover, the problem in the non-zero DMI case still remains as an open problem, which is the primary objective of the present work.…”