Hysteresis loop behaviors of a decorated double-walled cubic nanotube

Hamri, M. El; Bouhou, S.; Essaoudi, I.; Ainane, A.; Ahuja, Rajeev; Dujardin, F.

doi:10.1016/j.physb.2017.08.036

Cited by 7 publications

(3 citation statements)

References 39 publications

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“…In Figure 2a, for M core and M total , all the projections of the spins appear, because they take all the possible values due to the temperature that was used. In Figure 2b a triple hysteresis loop with the central loop appears; similar results appear for the double-walled cubic nanotube [10]. For Figure 2c, the cycle of hysteresis is smoothed and all projections continue to appering, obtaining a simple hysteresis cycle.…”

Section: Exchange Interactionssupporting

confidence: 66%

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: Exchange Interactionssupporting

confidence: 66%

Hysteresis in core/shell nanowire with mixed spin Ising

Barrero-Moreno¹,

Acosta-Medina²

2018

astp

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“…Previous works on high‐order spins models indicate that these systems present very rich magnetic behavior, such as multiloops hysteresis, superparamagnetism, that have been observed in real materials. [ 30,31 ] Most of these works have been performed with Hamiltonians that include antiferromagnetic (AF) interactions between nearest neighbors, crystal and external fields; [ 26 ] little is known about the added effect of next‐nearest neighbor interactions that certainly are present and in many cases can be quite relevant as we will see. In this work, we study a mixed spin‐(3/2–7/2) Ising‐type ferrimagnet where the different spins are alternated on a square lattice.…”

Section: Introductionmentioning

confidence: 99%

Mixed Spin‐(3/2,7/2) Ising‐Type Ferrimagnet: Monte Carlo–Mean Field Treatment

Espriella

Karimou

Buendı́a

2021

Physica Status Solidi (b)

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Mean field and Monte Carlo simulations techniques are applied to study the behavior of a mixed Ising spin model in a square lattice where spins 7/2 are located in alternating sites with spins 3/2. There is an antiferromagnetic interaction between nearest neighbors, ferromagnetic interactions between next-nearest neighbors, crystal fields, and a magnetic external field. The role of the different interactions in the magnetic behavior of the system is explored. It is found that depending on the combination of parameters in the Hamiltonian this system presents multiple hysteresis loops, exchange bias, compensation temperatures, and discontinuous magnetizations. The results are compared with previous studies that do not include the ferromagnetic next-nearest neighbor interactions and found that they can have a strong effect in the magnetic behavior of the system.

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“…The magnetic hysteresis and thermodynamic properties of double-walled carbon nanotubes are studied [6,7]. On the other hand, triple of hysteresis cycles have been observed in spin-1/2 core and spin-1 surface [8]. Kocakaplan et al have applied the effective field theory to study magnetic and thermal properties of a nanoscaled spin-1/2 hexagonal Ising nanowire [9].…”

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confidence: 99%