柔性衬底上非晶FeCuNbSiB薄膜应变感生各向异性的微带铁磁共振研究
Micro-strip ferromagnetic resonance study of strain-induced anisotropy in amorphous FeCuNbSiB film on flexible substrate
摘要：
用微带铁磁共振技术研究了在Kapton衬底上沉积的FeCuNbSiB（Finemet）薄膜的磁各向异性。我们已经表明，基板的灵活性允许由压电致动器产生的弹性应变的良好传输。以下的共振场的角度依赖性，我们还证明了通过施加相对较小的电压的致动器控制膜的磁各向异性的可能性。此外，一个合适的模型，考虑到数字图像相关测量的有效弹性应变和布里渊光散射测量的有效弹性系数，允许推导磁致伸缩系数。发现后者是正的（$(λ=16\times10^{-6}$），并且与通常报道的大块非晶FeCuNbSiB的值一致。
英文摘要：
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 $(λ=16\times10^{-6}$) and consistent with the usually reported values for bulk amorphous FeCuNbSiB.
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