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Título

Phases of anisotropic dipolar antiferromagnets: Mean field theory and Monte Carlo simulations

AutorFernández, Julio F.; Alonso, Juan J.
Palabras claveAntiferromagnetism
Magnetic moments
Magnetic anisotropy
Monte Carlo methods
Exchange interactions (electron)
Spin dynamics
Magnetic structure
Fecha de publicaciónene-2006
EditorAmerican Physical Society
CitaciónPhysical Review - Section B - Condensed Matter 73(2): 024412.1-024412.9 (2006)
ResumenWe study systems of classical magnetic dipoles on simple cubic lattices with dipolar and antiferromagnetic exchange interactions. By analysis and Monte Carlo (MC) simulations, we find how the antiferromagnetic phases vary with uniaxial and fourfold anisotropy constants (C and D respectively), as well as with exchange strength J. We pay special attention to the spin reorientation (SR) phase, and exhibit in detail the nature of its broken symmetries. By mean field theory and by MC, we also obtain the ratio of the higher ordering temperature to the SR transition temperature, and show that it depends mainly on D/C, and rather weakly on J. We find a reverse SR transition.
Descripción9 pages, 14 figures.-- PACS number(s): 75.45.+j, 75.10.Hk, 75.25.+z, 75.10.-b
Versión del editorhttp://dx.doi.org/10.1103/PhysRevB.73.024412
URIhttp://hdl.handle.net/10261/19757
DOI10.1103/PhysRevB.73.024412
ISSN1098-0121
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