Magnetic Properties of 2-Dimensional Dipolar Squares: Boundary Geometry Dependence

Simple item page
dc.creatorSugano, Ryoko
dc.creatorMatsushita, Katsuyoshi
dc.creatorKuroda, Akiyoshi
dc.creatorTomita, Yusuke
dc.creatorTakayama, Hajime
dc.date2007-01-19
dc.date.accessioned2026-07-07T07:53:35Z
dc.date.available2026-07-07T07:53:35Z
dc.descriptionBy means of the molecular dynamics simulation on gradual cooling processes, we investigate magnetic properties of classical spin systems only with the magnetic dipole-dipole interaction, which we call dipolar systems. Focusing on their finite-size effect, particularly their boundary geometry dependence, we study two finite dipolar squares cut out from a square lattice with $Φ=0$ and $π/4$, where $Φ$ is an angle between the direction of the lattice axis and that of the square boundary. Distinctly different results are obtained in the two dipolar squares. In the $Φ=0$ square, the ``from-edge-to-interior freezing'' of spins is observed. Its ground state has a multi-domain structure whose domains consist of the two among infinitely (continuously) degenerated Luttinger-Tisza (LT) ground-state orders on a bulk square lattice, i.e., the two antiferromagnetically aligned ferromagnetic chains (af-FMC) orders directed in parallel to the two lattice axes. In the $Φ=π/4$ square, on the other hand, the freezing starts from the interior of the square, and its ground state is nearly in a single domain with one of the two af-FMC orders. These geometry effects are argued to originate from the anisotropic nature of the dipole-dipole interaction which depends on the relative direction of sites in a real space of the interacting spins.
dc.description21 pages, 13 figures, submitted to Journal of Physical Society Japan
dc.identifierhttps://arxiv.org/abs/cond-mat/0701467
dc.identifierhttp://arxiv.org/abs/cond-mat/0701467
dc.identifierJ. Phys. Soc. Jpn., Vol.76, No.4, p.044705, March 26, 2007
dc.identifierdoi:10.1143/JPSJ.76.044705
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/126278
dc.subjectStatistical Mechanics
dc.titleMagnetic Properties of 2-Dimensional Dipolar Squares: Boundary Geometry Dependence
dc.typetext

Files

Collections

arXiv