Micro-strip ferromagnetic resonance study of strain-induced anisotropy in amorphous FeCuNbSiB film on flexible substrate

Abstract

The magnetic anisotropy of a FeCuNbSiB (Finemet) film deposited on Kapton has been studied by micro-strip ferromagnetic resonance technique. We have shown that the flexibility of the substrate allows a good transmission of elastic strains generated by a piezoelectric actuator. Following the resonance field angular dependence, we also demonstrate the possibility of controlling the magnetic anisotropy of the film by applying relatively small voltages to the actuator. Moreover, a suitable model taking into account the effective elastic strains measured by digital image correlation and the effective elastic coefficients measured by Brillouin light scattering, allowed to deduce the magnetostrictive coefficient. This latter was found to be positive $(\lambda =16\times 10^{-6}$) and consistent with the usually reported values for bulk amorphous FeCuNbSiB.

9 pages, 8 figures

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• Voltage controlled inversion of magnetic anisotropy in a ferromagnetic thin film at room temperature
• Piezo-control of magnetic anisotropy in GaMnAs: Reversible manipulation of magnetization orientation and irreversible magnetization switching
• Bending strain-tunable magnetic anisotropy in Co2FeAl Heusler thin film on Kapton
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Cited by in corpus (2)

• Quantifying magnetic anisotropy dispersion: Theoretical and experimental study of the magnetic properties of anisotropic FeCuNbSiB ferromagnetic films
• A rigorous two-dimensional model for the stripline ferromagnetic resonance response of metallic ferromagnetic films