Low-temperature properties of the dilute dipolar magnet LiHo_xY_(1-x)F_4

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dc.creatorBiltmo, A.
dc.creatorHenelius, P.
dc.date2008-03-06
dc.date.accessioned2026-07-07T10:12:52Z
dc.date.available2026-07-07T10:12:52Z
dc.descriptionWe analyze recent experiments on the dilute rare-earth compound LiHo_xY_(1-x)F_4 in the context of an effective Ising dipolar model. Using a Monte Carlo method we calculate the low-temperature behavior of the specific heat and linear susceptibility, and compare our results to measurements. In our model the susceptibility follows a Curie-Weiss law at high temperature, chi ~ 1/(T-T_cw), with a Curie-Weiss temperature that scales with dilution, T_cw ~ x, consistent with early experiments. We also find that the peak in the specific heat scales linearly with dilution, C_max(T) ~ x, in disagreement with recent experiments. Experimental studies do not reach a consensus on the functional form of these quantities, and in particular we do not see reported scalings of the form chi ~ T^-0.75 and chi ~ exp(-T/T_0). Furthermore we calculate the ground state magnetization as a function of dilution, and re-examine the phase diagram around the critical dilution x_c=0.24(3). We find that the spin glass susceptibility for the Ising model does not diverge below x_c, while recent experiments give strong evidence for a stable spin-glass phase in LiHo_0.167Y_0.833F_4.
dc.description6 pages, 9 figures
dc.identifierhttps://arxiv.org/abs/0803.0851
dc.identifierhttp://arxiv.org/abs/0803.0851
dc.identifierPhys. Rev. B 78, 054437 (2008)
dc.identifierdoi:10.1103/PhysRevB.78.054437
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/172331
dc.subjectStatistical Mechanics
dc.subjectDisordered Systems and Neural Networks
dc.subjectMaterials Science
dc.titleLow-temperature properties of the dilute dipolar magnet LiHo_xY_(1-x)F_4
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