Magnetic domain-wall motion study under an electric field in a Finemet® thin film on flexible substrate

[摘要] We study the influence of applied in-plane elastic strains on the static magnetic configuration of a 530 nm magnetostrictive FeCuNbSiB (Finemet(R)) thin film. The in-plane strains are induced via the application of a voltage to a piezoelectric actuator on which the film/substrate system was glued. A quantitative characterization of the voltage dependence of the induced-strain at the surface of the film was performed using a digital image correlation technique. Magnetic Force Microscopy (MFM) images at remanence (H=0 Oe and U=0 V) clearly reveal the presence of weak stripe domains. The effect of the voltage-induced strain shows the existence of a voltage threshold value for the strike configuration break. For a maximum strain of epsilon(xx) similar to 0.5 x 10(-3) we succeed in destabilizing the stripes configuration helping the setting up of a complete homogeneous magnetic pattern. (C) 2014 Elsevier B.V. All rights reserved.

[发布日期] 2015-01-01

[效力级别]  Proceedings Paper

[关键词] Magnetic force microscopy;Magnetic thin film;Stripe domain;Magnetoelastic behavior