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Abstract Ferromagnetic resonance (FMR) spectroscopy is applied for comparative analysis of granular (CoFeZ) x (Al 2 O 3 ) 100−x , (31 at%≤ x ≤47 at%) films containing pure FeCo-based nanoparticles (NPs)… Click to show full abstract
Abstract Ferromagnetic resonance (FMR) spectroscopy is applied for comparative analysis of granular (CoFeZ) x (Al 2 O 3 ) 100−x , (31 at%≤ x ≤47 at%) films containing pure FeCo-based nanoparticles (NPs) or “FeCo-based core – oxide shell” NPs inside Al 2 O 3 matrix when deposited in oxygen-free or oxygen-containing atmosphere, correspondingly. It is established that g-factor extracted from the FMR spectra of films with core–shell NPs decreases with x below the value g =2.0023 for free electron that is untypical for metallic NPs. This effect is associated with the formation of the interface between ferromagnetic core and anti ferromagnetic (ferrimagnetic) oxide shell of NPs.
Journal Title: Journal of Magnetism and Magnetic Materials
Year Published: 2017
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