Ferromagnetic Resonance Study of Fe/FePt Coupled Films With Perpendicular Anisotropy

• Type: Article in International Scientific Journal
• Date: 2008

Authors

D.S. Schmool (Author) FCUP; Apolinário, A. (Author) FCUP; Casoli, F (Author) Other; Albertini, F (Author) Other

Journal

Title: IEEE Transactions on Magnetics

Vol. 44 No. 11

Pages: 3087-3090

ISSN: 0018-9464

Publisher: IEEE

Indexing

ISI Web of Knowledge - 13 Citations

Scopus - 13 Citations

Other information

Authenticus ID: P-003-V5A

DOI: 10.1109/tmag.2008.2002792

Abstract (EN): We have studied exchange coupled FePt/Fe magnetic layers using the technique of ferromagnetic resonance (FMR). The FePt layers show strong uniaxial perpendicular anisotropy, growing in the L1(o) epitaxial phase on MgO (100). We have considered the case for two thicknesses of Fe: 2 nm and 3.5 run, which exhibit rigid magnet and exchange-spring behavior. All FePt thicknesses are limited to 10 nm. The FMR results display multipeaked spectra, where we have identified three Fe resonance lines in the RM sample and an extra two in the ES sample. Angular FMR studies show a strong uniaxial anisotropy induced in the Fe layer via the strong exchange coupling with the FePt film. An additional uniaxial component is also observed with an easy axis inclined by about 50 degrees from the film normal. Supplementary magnetic measurements aid with the magnetic characterization. We also discuss the elements for the theory of FMR in these exchanged coupled systems.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4