Monte Carlo studies of the dipolar spin ice model

Monte Carlo studies of the dipolar spin ice model

We present a detailed overview of numerical Monte Carlo studies of the dipolar spin ice model, which has been shown to be an excellent quantitative descriptor of the Ising pyrochlore materials Dy2Ti2O7 and Ho2Ti2O7. We show that the dipolar spin ice model can reproduce an effective quasi-macroscopic...

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Veröffentlicht in:Journal of physics. Condensed matter 2004-11, Vol.16 (43), p.R1277-R1319
Hauptverfasser: Melko, Roger G, Gingras, Michel J P
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Sprache:eng
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Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
General theory and models of magnetic ordering
Magnetic properties and materials
Physics
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container_issue 43
container_start_page R1277
container_title Journal of physics. Condensed matter
container_volume 16
creator Melko, Roger G
Gingras, Michel J P
description We present a detailed overview of numerical Monte Carlo studies of the dipolar spin ice model, which has been shown to be an excellent quantitative descriptor of the Ising pyrochlore materials Dy2Ti2O7 and Ho2Ti2O7. We show that the dipolar spin ice model can reproduce an effective quasi-macroscopically degenerate ground state and spin ice behaviour of these materials when the long range nature of dipole-dipole interaction is handled carefully using Ewald summation techniques. This degeneracy is, however, ultimately lifted at low temperature. The long range ordered state is identified via Monte Carlo simulation techniques. Finally, we investigate the behaviour of the dipolar spin ice model in an applied magnetic field and compare our predictions to experimental results. We find that a number of different long range ordered ground states are favoured by the model, depending on field direction.
doi_str_mv 10.1088/0953-8984/16/43/R02
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subjects Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
General theory and models of magnetic ordering
Magnetic properties and materials
Physics
title Monte Carlo studies of the dipolar spin ice model
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