We present Monte Carlo simulation data about Holmium magnetic thin film structures. As well known, this rare earth shows, at transition temperature T-N, a helical order in the bulk phase. In contrast with the collinear ferromagnetic or antiferromagnetic thin films, recent experimental works have proven that the transition temperature T-N(n) (n being the film thickness) depends on n only by an empirical relation. In order to study the behavior of these film structures, we consider a Heisenberg model with easy-plane single ion anisotropy and seven coupling constant (J(0) in the plane and J(1)-J(6) between plane of the Ho hcp structure), obtained by experimental neutron measurements.
Monte Carlo simulations on thin rare earth films: preliminary data / F. Cinti; A. Cuccoli; A. Rettori. - In: PHYSICS PROCEDIA. - ISSN 1875-3892. - STAMPA. - 7:(2010), pp. 34-38. (Intervento presentato al convegno Computer Simulation Studies in Condensed Matter Physics XX, CSP-2007 tenutosi a Athens, GA, USA nel 2007) [10.1016/j.phpro.2010.09.042].
Monte Carlo simulations on thin rare earth films: preliminary data
CINTI, FABIO;CUCCOLI, ALESSANDRO;RETTORI, ANGELO
2010
Abstract
We present Monte Carlo simulation data about Holmium magnetic thin film structures. As well known, this rare earth shows, at transition temperature T-N, a helical order in the bulk phase. In contrast with the collinear ferromagnetic or antiferromagnetic thin films, recent experimental works have proven that the transition temperature T-N(n) (n being the film thickness) depends on n only by an empirical relation. In order to study the behavior of these film structures, we consider a Heisenberg model with easy-plane single ion anisotropy and seven coupling constant (J(0) in the plane and J(1)-J(6) between plane of the Ho hcp structure), obtained by experimental neutron measurements.File | Dimensione | Formato | |
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