http://www.cnr.it/ontology/cnr/individuo/prodotto/ID197144

Modeling Exchange-Spring Layered Systems With Perpendicular Anisotropy Using Ferromagnetic Resonance Measurements (Articolo in rivista)

Type

Prodotto della ricerca (Classe)
Articolo in rivista (Classe)

Label

Modeling Exchange-Spring Layered Systems With Perpendicular Anisotropy Using Ferromagnetic Resonance Measurements (Articolo in rivista) (literal)

Anno

2012-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1109/TMAG.2012.2195645 (literal)

Alternative label

D. S. Schmool, F. J. T. Gonçalves, A. Apolinário, N. de Sousa, N. A. Sobolev, F. Casoli, F. Albertini, P. Lupo, R. L. Stamps, and C. Hu (2012)
Modeling Exchange-Spring Layered Systems With Perpendicular Anisotropy Using Ferromagnetic Resonance Measurements
in IEEE transactions on magnetics; IEEE, New York (Stati Uniti d'America)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

D. S. Schmool, F. J. T. Gonçalves, A. Apolinário, N. de Sousa, N. A. Sobolev, F. Casoli, F. Albertini, P. Lupo, R. L. Stamps, and C. Hu (literal)

Pagina inizio

4081 (literal)

Pagina fine

4084 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

http://ieeexplore.ieee.org/xpl/articleDetails.jsp;jsessionid=8sCMQChf4D6gm27WlW6hRYWZq2HqLny2Wmsr7q67k1ZGJkY40367!1077968281?arnumber=6332921&contentType=Journals+%26+Magazines (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

48 (literal)

Rivista

IEEE transactions on magnetics (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

4 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

11 (literal)

Note

ISI Web of Science (WOS) (literal)
Scopu (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

IFIMUP-IN and Department of Physics and Astronomy, University of Porto Porto 4169-007, Portugal Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, Madrid, Spain Department of Physics & I3N, University of Aveiro, Campus Universitário de Santiago, Aveiro 3810-193, Portugal IMEM-CNR, Parma I-43124, Italy School of Physics and Astronomy, University of Glasgow, G12 8QQ, U.K. (literal)

Titolo

Modeling Exchange-Spring Layered Systems With Perpendicular Anisotropy Using Ferromagnetic Resonance Measurements (literal)

Abstract

We have experimentally studied the FePt/Fe_3Pt bilayer system using ferromagnetic resonance at room temperature. Measurements were taken as a function of the direction of the applied external magnetic field with respect to the sample plane. Results show that the effect of exchange coupling is manifest by the induction of a strong perpendicular anisotropy into the soft layer (Fe_3Pt) from the hard layer (FePt). We have used the angular variation of the resonance field to allow us to assess the anisotropy constants for three different thicknesses of the soft layer (2, 3.5 and 5 nm). We observe a decrease of the overall perpendicular anisotropy as the soft layer thickness increases. We note that the hard layer does not contribute to the spectra under the experimental conditions used (9.3 GHz, magnetic fields up to 1 T). We have modeled the bilayer system using the free energy of the system, which includes the effective anisotropies of the layers. In order to fully appreciate the effects of exchange coupling, we have used previously published data of the spin orientation in the soft layer to assess the most appropriate values of the anisotropy constants for the FePt/Fe system. The results indicate that the best way to model these hard-soft coupled ferromagnetic layers is by using a variable effective anisotropy constant in the soft layer, from which almost exact solutions can be obtained. Averaging the anisotropy over the entire layer gives a good measure of the effective anisotropy and the thickness dependence of the effective anisotropy agrees very well with that found experimentally using ferromagnetic resonance. (literal)

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