Ising and anisotropic Heisenberg magnets with mobile defects

2004/06/17 by M. Holtschneider, R. Leidl, W. Selke · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Theoretical and Computational Physics #cond-mat.stat-mech

paper · pdf · doi:10.1016/j.jmmm.2004.11.200

published as J. Magn. Magn. Mater. 290-291, 326-329 (2005) · 3 pages, 4 figures. Submitted to JEMS'04

arxiv created 2004/06/17 · openalex publication_date 2004/12/13 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Motivated by experiments on (Sr,Ca,La)₁4 Cu₂4 O₄1, a two-dimensional Ising model with mobile defects and a two-dimensional anisotropic Heisenberg antiferromagnet have been proposed and studied recently. We extend previous investigations by analysing phase diagrams of both models in external fields using mainly Monte Carlo techniques. In the Ising case, the phase transition is due to the thermal instability of defect stripes, in the Heisenberg case additional spin-flop structures play an essential role.

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