4.4 Article Proceedings Paper

Film Thickness Gradient-Induced Magnetic Anisotropy and Ferromagnetic Resonance in Fe56Co24B20 Amorphous Films Prepared by Pulse Laser Deposition

Journal

IEEE TRANSACTIONS ON MAGNETICS
Volume 51, Issue 11, Pages -

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMAG.2015.2437912

Keywords

High-frequency soft magnetic films; magnetic anisotropy; pulse laser deposition; thickness-gradient films

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Fe56Co24B20 amorphous films with a large thickness gradient were prepared by pulse laser deposition via moving the sample shutter. The film thickness is varied from 274 to 28.7 nm for a sample with 25 mm in length. The thickness gradient gives rise to a well-defined uniaxial magnetic anisotropy (UMA) with the hard-axis along the direction of thickness gradient. A gradually increased UMA field H-K was induced from 110 to 245 Oe along the thickness gradient direction by the interface stress. As a result, the ferromagnetic resonance frequencies f(FMR) increase from 3.79 to 5.76 GHz with the film thinning.

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