Theory of Two-Step Magnetic Ordering Phenomena in a Geometrically Frustrated Heisenberg Pyrochlore Antiferromagnet with Long Range Dipolar Interactions

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dc.creatorEnjalran, Matthew
dc.creatorGingras, Michel J. P.
dc.date2003-07-07
dc.date.accessioned2026-07-07T02:52:14Z
dc.date.available2026-07-07T02:52:14Z
dc.descriptionA model for a Heisenberg antiferromagnet on a pyrochlore lattice with exchange and dipole-dipole interactions is studied via mean-field theory. In treating the dipoles by use of the Ewald method, a soft (critical) mode with a unique ordering wave vector is selected for all strengths of the dipole-dipole coupling. For weak dipoles a partially ordered, three sublattice spin structure (P state), with q_{ord}= (1/2 1/2 1/2), is selected. A fully ordered, four sublattice spin structure (F state), with q = (000), competes with the P state and becomes the stable structure as the temperature is reduced. Our results are compared against other theoretical calculations and connections to recent experimental results for Gd2Ti2O7 are discussed.
dc.descriptionRevtex4, 5 pages, 5 eps figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0307152
dc.identifierhttp://arxiv.org/abs/cond-mat/0307152
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/21763
dc.subjectStatistical Mechanics
dc.subjectMaterials Science
dc.titleTheory of Two-Step Magnetic Ordering Phenomena in a Geometrically Frustrated Heisenberg Pyrochlore Antiferromagnet with Long Range Dipolar Interactions
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