RT Journal Article
T1 Ferromagnetic frozen structures from the dipolar hard spheres fluid at moderate and small volume fractions
A1 Russier, Vincent
A1 Malherbe, Jean G.
A1 Alonso-Pereda, Juan José
K1 Dipolos magnéticos
AB We study the magnetic phase diagram of an ensemble of dipolar hard spheres (DHS) with or without uniaxial anisotropy and frozen in position on a disordered structure by tempered Monte Carlo simulations. The crucial point is to consider an anisotropic structure, obtained from the liquid state of the dipolar hard spheres fluid, frozen in its polarized state at low temperature. The freezing inverse temperature βf determines the degree of anisotropy of the structure which is quantified through a structural nematic order parameter, λs. The case of the non zero uniaxial anisotropy is considered only in its infinitely strong strength limit where the system transforms in a dipolar Ising model (DIM). The important finding of this work is that both the DHS and the DIM with a frozen structure build in this way present a ferromagnetic phase at volume fractions below the threshold value where the corresponding isotropic DHS systems exhibit a spin glass phase at low temperature.
PB IOP Publishing
YR 2023
FD 2023
LK https://hdl.handle.net/10630/37221
UL https://hdl.handle.net/10630/37221
LA eng
NO Malherbe, J-G  Russier, V and Alonso, Juan J. Ferromagnetic frozen structures from the dipolar hard spheres fluid at moderate and small volume fractions. Journal of Physics: Condensed Matter 35, 305802 (2023). https://dx.doi.org/10.1088/1361-648X/accf58
NO GENCI, CINES, France, Allocations 2021-A0100906180 and 2022-A0120906180
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026