Ferromagnetic resonance study of the misalignment between anisotropy axes in exchange-biased NiFe/FeMn/Co trilayers

Exchange-biased NiFe/FeMn/Co trilayers were grown by dc magnetron sputtering and analyzed by in-plane ferromagnetic resonance using Q-band microwaves. The experiments revealed that distinct Co and NiFe resonance modes were excited by the microwave field. A misalignment between the anisotropy axes of...

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Bibliographic Details
Published in:Applied physics letters 2014-05, Vol.104 (20)
Main Authors: Barreto, P. G., Sousa, M. A., Pelegrini, F., Alayo, W., Litterst, F. J., Baggio-Saitovitch, E.
Format: Article
Language:English
Subjects:
Anisotropy
Applied physics
Axes (reference lines)
Exchanging
Ferromagnetic resonance
Ferromagnetism
Intermetallic compounds
Iron compounds
Magnetron sputtering
Microwaves
Misalignment
Nickel compounds
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Summary:Exchange-biased NiFe/FeMn/Co trilayers were grown by dc magnetron sputtering and analyzed by in-plane ferromagnetic resonance using Q-band microwaves. The experiments revealed that distinct Co and NiFe resonance modes were excited by the microwave field. A misalignment between the anisotropy axes of the magnetic layers was deduced from the angular variations of the resonance fields, which also showed the effects of uniaxial and unidirectional anisotropies. A phenomenological model was used to fit the experimental results taking also into account a rotatable anisotropy field associated to the domain structure of the FeMn layer and the magnetic history of the films.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4875929