Purely mechanical strain‐tunable microwave magnetism device with lightweight, flexible, and wearable is crucial for passive sensing systems and spintronic devices (noncontact), such as flexible microwave detectors, flexible microwave signal processing devices, and wearable mechanics‐magnetic sensors. Here, a flexible microwave magnetic CuFe₂O₄ (CuFO) epitaxial thin film with tunable ferromagnetic resonance (FMR) spectra is demonstrated by purely mechanical strains, including tensile and compressive strains, on flexible fluorophlogopite (Mica) substrates. Tensile and compressive strains show remarkable tuning effects of up‐regulation and down‐regulation on in‐plane FMR resonance field (H_r), which can be used for flexible tunable resonators and filters. The out‐of‐plane FMR spectra can also be tuned by mechanical bending, including H_r and absorption peak. The change of out‐of‐plane FMR spectra has great potential for flexible mechanics‐magnetic deformation sensors. Furthermore, a superior microwave magnetic stability and mechanical antifatigue character are obtained in the CuFO/Mica thin films. These flexible epitaxial CuFO thin films with tunable microwave magnetism and excellent mechanical durability are promising for the applications in flexible spintronics, microwave detectors, and oscillators.

中文翻译：

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用于穿戴式传感器的柔性CuFe2O4外延薄膜中的机械应变可调微波磁学

具有轻巧，灵活且可穿戴的纯机械应变可调微波磁性设备对于无源传感系统和自旋电子设备（非接触式）至关重要，例如柔性微波检测器，柔性微波信号处理设备和可穿戴机械电磁传感器。在此，通过挠性氟金云母（Mica）基板上的纯机械应变，包括拉伸和压缩应变，证明了具有可调铁磁共振（FMR）光谱的柔性微波CuFe ₂ O ₄（CuFO）外延薄膜。拉伸和压缩应变对平面FMR共振场（H _r），可用于灵活的可调谐振器和滤波器。平面外FMR光谱也可以通过机械弯曲来调谐，包括H _r和吸收峰。平面外FMR谱的变化对于灵活的机械磁性变形传感器具有巨大的潜力。此外，在CuFO /云母薄膜中获得了优异的微波磁稳定性和机械抗疲劳特性。这些具有可调微波磁性和出色机械耐久性的柔性外延CuFO薄膜有望用于柔性自旋电子器件，微波检测器和振荡器。