Critical behavior of low dimensional magnetic systems

Özkan, Aycan; Kutlu, B.

doi:10.1016/j.jmmm.2016.10.125

Cited by 3 publications

(1 citation statement)

References 42 publications

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“…The study of the changes in T c was previously carried out, considering different values for J ss and J cc [16]. In all cases there is a enhancement of H c , which has been evidenced in previous studies conducted in nanowires by means of Monte Carlo simulations [27,9,14].…”

Section: Shell Coercive Fieldmentioning

confidence: 64%

Hysteresis in core/shell nanowire with mixed spin Ising

Barrero-Moreno¹,

Acosta-Medina²

2018

astp

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In this work, Monte Carlo simulations (MCS) based on Metropolis algorithm were performed to study the hysteresis loops and coercive field of a core/shell nanowire with spins S = ± 5 2 , ± 3 2 , ± 1 2 and σ = ± 3 2 , ± 1 2 , respectivility, considering an Ising ferrimagnetic system. The influence of nearest neighbors exchange interactions and crystal field anisotropy on hysteresis and coercive field behaviors of the system has been analyzed. The calculations were performed using a single-spin flip algorithm. In each spin-flip attempt, we randomly choose a site. The results show that, for a system without anisotropy triple hysteresis loops appear for certain values. The plateaus in hysteresis loops are due to the values of the spins projections. The change of the values for anisotropy influence the shape of the hysteresis loops without present triple hysteresis loops. Also, the effect of the anisotropy in the coercive field was analyzed, where the coercive field present enhanced for certain range of the temperatures. Finally, for high values of the applied external magnetic field, the Zeeman effect takes control over the system.

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Section: Shell Coercive Fieldmentioning

confidence: 64%

Hysteresis in core/shell nanowire with mixed spin Ising

Barrero-Moreno¹,

Acosta-Medina²

2018

astp

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Low dimensional mixed-spin Ising model with next-nearest neighbor interaction

Özkan

Kutlu

2017

Superlattices and Microstructures

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An Analytical Description of the Magnetic Conductance Across an Isolated Defect Region in a 1D-Ferromagnetic Lead

Belayadi

Bourahla

Mougari

2019

SPIN

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We illustrate in this contribution the determination of the magnetic conductance across a nanocontact region defined by an isolated defect region joined between two mono-atomic leads ferromagnetically ordered. The system is described by the Heisenberg interaction. Additionally, to deal with the lack of symmetry across the contact region defined by the isolated defect, we involve the phase field matching approach. Furthermore, to compute the quantum conductance, we define the quantum scattering of the transmission and reflection probabilities within the framework of Landauer–Büttiker formalism. Based on these approaches, we present an analytical expression of the magnetic conductance. The obtained analytical results based on our adopted procedures confirm the known results adopted for perfect infinite leads (no defect). Our model calculations can be applied numerically when we deal with doping across the defect region. The adopted model could be also used numerically to deal with the impurity configurations that one might encounter in real systems.

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Critical behavior of low dimensional magnetic systems

Cited by 3 publications

References 42 publications

Hysteresis in core/shell nanowire with mixed spin Ising

Hysteresis in core/shell nanowire with mixed spin Ising

Low dimensional mixed-spin Ising model with next-nearest neighbor interaction

An Analytical Description of the Magnetic Conductance Across an Isolated Defect Region in a 1D-Ferromagnetic Lead

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