Phase transitions in an ordered 2D array of cubic nanoparticles

Белим, С. В.; Lyakh, O. V.

doi:10.22226/2410-3535-2022-2-126-130

Cited by 2 publications

(1 citation statement)

References 37 publications

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“…Dipolar forces can lead to supermagnetic ordering in a nanowires array. As shown by the simulation of ferromagnetic nanoparticle ensembles [31][32][33], different types of ordering are possible for the magnetic moments of the particles. The type of ordering depends on the orientation of the anisotropy direction relative to the substrate.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Properties of 2D Nanowire Arrays: Computer Simulations

Белим

Bychkov

2023

Materials

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The paper considers a nanowires 2D array located in the nodes of a square lattice. Computer simulations use the Heisenberg model and Metropolis algorithm. The array consists of small nanowires that are monodomain. The exchange interaction orders the spins within a single nanowire. Dipole–dipole forces act between neighboring nanowires. The shape of an individual nanowire affects its magnetic anisotropy. Computer simulations examine the phase transition temperature and magnetization behavior of the system. The type of magnetic moments ordering in the array of nanowires depends on the orientation of their long axis. We consider two types of systems. The nanowires’ long axes are oriented perpendicular to the plane of their location in the first case. A dipole–dipole interaction results in first-type superantiferromagnetic ordering of the nanowires’ magnetic moments for such orientation. The nanowires’ long axes are oriented in the plane of the system in the second case. Dipole–dipole interaction results in second-type superantiferromagnetic ordering in such systems. The dependence of the phase transition temperature on the dipole–dipole interaction intensity is investigated.

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Section: Introductionmentioning

confidence: 99%

Magnetic Properties of 2D Nanowire Arrays: Computer Simulations

Белим

Bychkov

2023

Materials

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Study of ordering in 2D ferromagnetic nanoparticles arrays: Computer simulation

Belim

2023

AIMSMATES

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<abstract> <p>This article describes ordering in a 2D ferromagnetic nanoparticles array by computer simulation. The Heisenberg model simulates the behavior of spins in nanoparticles. Nanoparticles interact using dipole-dipole forces. Computer simulations use the Monte Carlo method and Metropolis algorithm. Two possible types of ordering for the nanoparticles' magnetic moments are detected in the system. The magnetic anisotropy direction for the nanoparticles determines the type of ordering. If the anisotropy direction is oriented perpendicular to the substrate plane, then a superantiferromagnetic phase with staggered magnetization is realized. If the magnetic anisotropy is oriented in the nanoparticle plane, the superantiferromagnetic phase has a different structure. The nanoparticle array is broken into chains parallel to the anisotropy orientations. In one chain of nanoparticles, magnetic moments are oriented in the same way. The magnetic moments of the nanoparticles are oriented oppositely in neighbor chains. The temperature of phase transitions is calculated based on finite dimensional scaling theory. Temperature depends linearly on the intensity of the dipole-dipole interaction for both types of superantiferromagnetic transition.</p> </abstract>

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Phase transitions in an ordered 2D array of cubic nanoparticles

Cited by 2 publications

References 37 publications

Magnetic Properties of 2D Nanowire Arrays: Computer Simulations

Magnetic Properties of 2D Nanowire Arrays: Computer Simulations

Study of ordering in 2D ferromagnetic nanoparticles arrays: Computer simulation

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