55 citations · 529 across the 47 of their papers we have counts for
43 papers · 1 filter
Skyrmion-Bimeron Transformation in Bilayer Chiral Magnets with Competing Magnetic Anisotropy
Gülşen Doğan, Ümit Akıncı
In this work, we investigate the emergence of topological spin textures in a ferromagnetically coupled bilayer chiral magnet by means of Monte Carlo simulations of a classical spin…
Magnetocaloric effect in bilayer material: Spin-S Ising model
Ümit Akıncı, Yusuf Yüksel
The isothermal magnetic entropy change has been obtained for the bilayer system that consists of and valued spins in each layer. The relation between the IMEC and the s…
Magnetocaloric Properties of the Ising nanotube
Ümit Akıncı
The magneticaloric properties of the Ising nanotube constituted by arbitrary core spin values and the shell spin values have been investigated by mean field approximati…
Hysteresis Characteristics of Generalized Spin-S Magnetic Binary Alloys
Gülşen Karakoyun, Ümit Akıncı
In this study, hysteresis characteristics of the generalized spin-S binary alloy represented by the formula have been investigated within the framework of effective f…
Phase Diagrams of Generalized Spin-S Magnetic Binary Alloys
Gülşen Karakoyun, Ümit Akıncı
Critical properties of the generalized spin-S magnetic binary alloys represented by have been investigated within the framework of EFT. By inspecting the evolution o…
Magnetocaloric properties of the binary Ising model with arbitrary spin
Ümit Akıncı
The magnetocaloric properties of the Ising binary alloys composed of arbitrary spin values, have been determined by using effective field theory. For determining the efficiency of…
Magnetic properties of the multi-walled nanotubes constituted by localized magnetic moments: spin-1/2 case
Ümit Akıncı
Magnetic properties of the multi-walled nanotubes have been investigated. Heisenberg model, which is a suitable model for the system consist of atoms with localized wave functions…
Dynamical response of the Ising model to the amplitude modulated time dependent magnetic field
Ümit Akıncı
The dynamical Ising model under the effect of the amplitude modulated time dependent periodic magnetic field has been solved by using EFT with Glauber type of stochastic process. S…
Hysteresis Behaviors of the Binary Ising Model
Ümit Akıncı, Gülşen Karakoyun
Hysteresis behaviors of the binary alloy system represented by the formula have been investigated within the framework of EFT. The system consists of type A atoms (sp…
Hysteresis behaviours of the crystal field diluted general spin-S Ising model
Ümit Akıncı
Hysteresis characteristics of the crystal field diluted general Spin-S () Blume-Capel model have been studied within the effective field approximation. Particular emphasis has…
On the hysteresis behaviors of the higher spin Ising model
Ümit Akıncı
Hysteresis characteristics of the general Spin-S () Blume-Capel model have been studied within the effective field approximation. Particular emphasis has been paid on the larg…
Nonequilibrium phase transitions in isotropic Ashkin-Teller Model
Ümit Akıncı
Dynamic behaviour of an isotropic Ashkin-Teller model in the presence of a periodically oscillating magnetic field has been analysed by means of the mean field approximation. The d…
Hysteresis behaviors of a spin-1 anisotropic Heisenberg model
Ümit Akıncı
The hysteresis behaviors of anisotropic S-1 Heisenberg model have been studied within the effective field theory with two spin cluster. After giving the phase diagrams, the effect…
Hysteresis Behavior of Anisotropic Heisenberg Model in Thin Film Geometry
Ümit Akıncı, Musa Atlıhan
The effect of the anisotropy in the exchange interaction and film thickness on the hysteresis behavior of the anisotropic Heisenberg thin film has been investigated with effective…
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
Yusuf Yuksel, Umit Akinci
Ferromagnetic-paramagnetic phase transitions in classical and quantum thin films have been studied up to 50 mono-layers using effective field theory with two-site cluster approxima…
Effective field theory in larger clusters - Ising Model
Ümit Akıncı
General formulation for the effective field theory with differential operator technique and the decoupling approximation with larger finite clusters (namely EFT- formulation) ha…
Hysteresis behavior of the anisotropic quantum Heisenberg model driven by periodic magnetic field
Ümit Akıncı
Dynamic behavior of a quantum Heisenberg ferromagnet in the presence of a periodically oscillating magnetic field has been analyzed by means of the effective field theory with two…
Random Field Distributed Heisenberg Model on a Thin Film Geometry
Ümit Akıncı
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 cluste…
Anisotropic Heisenberg Model on Core-Shell Structured Nanotube Geometry
Ümit Akıncı
The effect of the anisotropy in the exchange interaction on the critical temperature and the order parameter of the anisotropic Heisenberg model on a core-shell structured nanotube…
Universality Aspects of Layering Transitions in Ferromagnetic Blume-Capel Thin Films
Yusuf Yuksel, Umit Akinci
Critical phenomena and universality behavior of ferromagnetic thin films described by a spin-1 Blume-Capel Hamiltonian has been examined for various thickness values ranging from 3…
Time dependent magnetic field effects on the Ising model
Erol Vatansever, Umit Akinci, Hamza Polat
Nonequilibrium phase transition properties of the Ising model under a time dependent oscillating perturbation are investigated within the framework of effective field theor…
Anisotropic Heisenberg Model in Thin Film Geometry
Ümit Akıncı
The effect of the anisotropy in the exchange interaction on the phase diagrams and magnetization behavior of the Heisenberg thin film has been investigated with effective field for…
Dynamic hysteretic features of the Ising-type thin films
Bahadır Ozan Aktaş, Ümit Akıncı, Hamza Polat
In order to elucidate the important characteristics of hysteretic response, such as types of the frequency dispersion curves, the decay of hysteresis loop area, the mechanism of do…
Random field effects on the isotropic quantum Heisenberg model with Gaussian random magnetic field distribution
Ümit Akıncı
Effect of Gaussian random magnetic field distribution which is centered at zero on the phase transition properties of isotropic quantum Heisenberg model has been investigated on tw…