PECULIARITIES OF ORDERING DUE TO DISORDER IN PLANAR ANTIFERROMAGNETIC DEGENERATE STRUCTURES

V. M. Rozenbaum
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V. M. Rozenbaum: Institute of Surface Chemistry, National Academy of Sciences of Ukraine, Pr. Nauki 31, Kiev-22, 252022, Ukraine

Surface Review and Letters (SRL), 1997, vol. 04, issue 01, 9-14

Abstract: A model is suggested which allows a description of low-temperature behavior for a 2D system of dipole moments on a square lattice with an arbitrary anisotropic long-range interaction giving rise to continuously degenerate antiferromagnetic ground states. It is shown that the breaking of the ground-state degeneracy and intersublattice ordering of dipole moments caused by thermodynamic fluctuations are responsible for long-range-order initiation in systems with anisotropic interaction and for short-range-order conservation in systems with isotropic short-range interaction.

Keywords: 75.40.Cx; 64.60. Cn; 75.25.+z; 75.50.Kj (search for similar items in EconPapers)
Date: 1997
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DOI: 10.1142/S0218625X97000031

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