Phase diagram of a three-dimensional dipolar Ising model with textured Ising axes

Abstract

We study from tempered Monte Carlo simulations the magnetic phase diagram of a textured dipolar Ising model on a face centered cubic lattice. The Ising coupling of the model follow the dipole-dipole interaction. The Ising axes are distributed with a uniaxial symmetry along the $\hat{z}$ direction with a gaussian probability density of the polar angles. This distribution provides a quenched disorder realization of the dipolar Ising model making a continuous link between the parallel axes dipoles and the random axes dipole models. As expected the phase diagram presents three distinctive phases: paramagnetic, ferromagnetic and spin-glass. A quasi long range ferromagnetic and a reentrant spin-glass phases are obtained in the vicinity of the ferromagnetic spin-glass line. This model provides a way to predict the magnetic phases of magnetic nanoparticles supracrystals in terms of the texturation of the easy axes distribution in the strong anisotropy limit.

arXiv commentTo be published in Journal of Physics: Condensed Matter

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Cited by in corpus (4)

• Phase diagram of a three-dimensional dipolar model on a FCC lattice
• Magnetic ordering of random dense packings of freely rotating dipoles
• Ferromagnetic frozen structures from the dipolar hard spheres fluid at moderate and small volume fractions
• Role of positional disorder in fully textured ensembles of Ising-like dipoles