Spin reorientation transition and phase diagram of ultrathin ferromagnetic films
dc.contributor.author | Carubelli, Marianela | pt_BR |
dc.contributor.author | Billoni, Orlando Vito | pt_BR |
dc.contributor.author | Pighin, Santiago Alberto | pt_BR |
dc.contributor.author | Cannas, Sergio A. | pt_BR |
dc.contributor.author | Stariolo, Daniel Adrian | pt_BR |
dc.contributor.author | Tamarit, Francisco A. | pt_BR |
dc.date.accessioned | 2014-10-14T02:13:03Z | pt_BR |
dc.date.issued | 2008 | pt_BR |
dc.identifier.issn | 1098-0121 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/104519 | pt_BR |
dc.description.abstract | We show results from Monte Carlo simulations of a two-dimensional Heisenberg model for ultrathin films with perpendicular anisotropy. A complete phase diagram is obtained as a function of anisotropy and temperature, spanning a wide range of behavior. We discuss our results in relation to experimental findings in different ultrathin films. We observe and characterize a line of spin reorientation transitions. This transition from out-of-plane stripe order to in-plane ferromagnetic order presents an intermediate paramagnetic gap in a finite region of parameter space, as reported in experiments. For large anisotropies, direct transitions from a low temperature stripe phase to a paramagnetic or tetragonal phase with dominant perpendicular magnetization is observed, which is also in agreement with experiments. We also show the phase diagram for a system without exchange, i.e., with pure dipolar and anisotropy interactions. It shows a similar behavior to the ferromagnetic case with antiferromagnetic instead of stripe phases at low temperatures. A spin reorientation transition is also found in this case. | en |
dc.format.mimetype | application/pdf | |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Physical review. B, Condensed matter and materials physics. New York. Vol. 77, no. 13 (Apr. 2008), 134417, 9p. | pt_BR |
dc.rights | Open Access | en |
dc.subject | Diagramas de fase | pt_BR |
dc.subject | Ferromagnetismo | pt_BR |
dc.subject | Filmes finos | pt_BR |
dc.subject | Pontos criticos | pt_BR |
dc.title | Spin reorientation transition and phase diagram of ultrathin ferromagnetic films | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000637845 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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