On the failure of effective-field theory in predicting a spurious spontaneous ordering and phase transition of Ising nanoparticles, nanoislands, nanotubes and nanowires

We studied some magnetic behaviors of the Ising model in a triangular spin tube using the effective field theory (EFT) with correlations. We examined the effects of exchange anisotropy, and temperature T on the magnetic properties of the spin ½ Ising model in a triangular spin tube, particularly for isotherm magnetization, spontaneous magnetization, and magnetic susceptibility. We investigated the magnetic properties of the triangular spin ½ tube in detail. At low temperature, magnetization curves of a triangular spin ½ tube of the Ising model with the intra-triangular J ┴, and inter-triangular J // interaction exchange are examined within the behavior magnetic. It is shown that the developed model satisfactorily describes all pronounced features of the low-temperature magnetization process and the magnetothermodynamics such as abrupt changes of the isothermal magnetization curves, a giant magnetocaloric effect. Among the most notable features of zero-temperature magnetization curves, one could mention fractional magnetization plateaus, quantum spin liquids, and macroscopic magnetization jumps, which can be found first of all in frustrated quantum Heisenberg spin models.

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Magnetization Plateaus at Low Temperature in a Triangular Spin Tube

Farchakh

Boubekri

Hafidi

2021

J Low Temp Phys

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Anomalous thermodynamics in a mixed spin-1/2 and spin-1 hexagonal nanowire system

Pimenta

Rojas

Souza

2022

Journal of Magnetism and Magnetic Materials

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Magnetic properties of a hexagonal nanowire system with mixed spin: Application of the stochastic Glauber dynamics with mean-field approximation

Mendes¹,

Santos²,

Barreto

2022

Journal of Physics and Chemistry of Solids

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On the failure of effective-field theory in predicting a spurious spontaneous ordering and phase transition of Ising nanoparticles, nanoislands, nanotubes and nanowires

Cited by 6 publications

References 161 publications

Magnetization Plateaus at Low Temperature in a Triangular Spin Tube

Magnetization Plateaus at Low Temperature in a Triangular Spin Tube

Anomalous thermodynamics in a mixed spin-1/2 and spin-1 hexagonal nanowire system

Magnetic properties of a hexagonal nanowire system with mixed spin: Application of the stochastic Glauber dynamics with mean-field approximation

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