Abstract We perform a theoretical and experimental investigation of the magnetic properties and magnetization dynamics of a ferromagnetic magnetostrictive multilayer grown onto a flexible substrate and submitted to external stress. We calculate the magnetic behavior and magnetoimpedance effect for a trilayered system from an approach that considers a magnetic permeability model for planar geometry and a magnetic free energy density which takes into account induced uniaxial and magnetoelastic anisotropy contributions. We verify remarkable modifications of the magnetic anisotropy with external stress, as well as we show that the dynamic magnetic response is strongly affected by these changes. We discuss the magnetic features that lead to modifications of the frequency limits where distinct mechanisms are responsible by the magnetoimpedance variations, enabling us to manipulate the resonance fields. To test the robustness of the approach, we directly compare theoretical results with experimental data. Thus, we provide experimental evidence to confirm the validity of the theoretical approach, as well as to manipulate the resonance fields to tune the MI response according to real applications in devices.

中文翻译：

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通过应力操纵磁各向异性和磁化动力学：数值计算和实验

摘要 我们对生长在柔性基板上并承受外部应力的铁磁磁致伸缩多层膜的磁性和磁化动力学进行了理论和实验研究。我们通过考虑平面几何的磁导率模型和考虑感应单轴和磁致弹性各向异性贡献的磁自由能密度的方法计算三层系统的磁行为和磁阻抗效应。我们验证了外部应力对磁各向异性的显着修改，并且我们表明动态磁响应受到这些变化的强烈影响。我们讨论了导致频率限制修改的磁性特征，其中不同的机制由磁阻抗变化负责，使我们能够操纵共振场。为了测试该方法的稳健性，我们直接将理论结果与实验数据进行比较。因此，我们提供了实验证据来确认理论方法的有效性，并根据设备中的实际应用操纵共振场以调整 MI 响应。