Dipolar interaction between two-dimensional magnetic particles

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dc.creatorPoliti, Paolo
dc.creatorPini, Maria Gloria
dc.date2002-08-06
dc.date.accessioned2026-07-07T02:46:43Z
dc.date.available2026-07-07T02:46:43Z
dc.descriptionWe determine the effective dipolar interaction between single domain two-dimensional ferromagnetic particles (islands or dots), taking into account their finite size. The first correction term decays as 1/D^5, where D is the distance between particles. If the particles are arranged in a regular two-dimensional array and are magnetized in plane, we show that the correction term reinforces the antiferromagnetic character of the ground state in a square lattice, and the ferromagnetic one in a triangular lattice. We also determine the dipolar spin-wave spectrum and evaluate how the Curie temperature of an ensemble of magnetic particles scales with the parameters defining the particle array: height and size of each particle, and interparticle distance. Our results show that dipolar coupling between particles might induce ferromagnetic long range order at experimentally relevant temperatures. However, depending on the size of the particles, such a collective phenomenon may be disguised by superparamagnetism.
dc.description11 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0208097
dc.identifierhttp://arxiv.org/abs/cond-mat/0208097
dc.identifierPhys. Rev. B 66, 214414 (2002)
dc.identifierdoi:10.1103/PhysRevB.66.214414
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/19736
dc.subjectMaterials Science
dc.titleDipolar interaction between two-dimensional magnetic particles
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