Flexible magnetic materials and devices with basic functional properties are highly desirable for flexible electronic applications in wearable products and implantable systems. In this work, a freestanding polycrystalline yttrium iron garnet (YIG) thin film with strong magnetism has been synthesized by pulsed laser deposition using a water-dissolvable Sr₃Al₂O₆ sacrificial layer, and the magnetism of the resulting freestanding film was confirmed by a vibrating sample magnetometer and broadband ferromagnetic resonance spectroscopy. When transferred to a support layer using a thermal release tape, the flexible polycrystalline YIG thin film exhibits a lower damping constant α and larger magnetocrystalline anisotropy, in contrast to the polycrystalline heterostructure of YIG, which arises due to stress release. Thus, this work offers a viable solution for flexible YIG thin films that can be used in a number of applications.

中文翻译：

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独立式多晶钇铁石榴石薄膜的制备和宽带铁磁共振研究

具有基本功能特性的柔性磁性材料和器件非常适合可穿戴产品和可植入系统中的柔性电子应用。在这项工作中，使用水溶性 Sr ₃ Al ₂ O ₆通过脉冲激光沉积合成了一种具有强磁性的独立多晶钇铁石榴石 (YIG) 薄膜。牺牲层，并且通过振动样品磁力计和宽带铁磁共振光谱证实了所得独立膜的磁性。当使用热释放胶带转移到支撑层时，柔性多晶 YIG 薄膜表现出较低的阻尼常数 α 和较大的磁晶各向异性，这与 YIG 的多晶异质结构相比，由于应力释放而产生。因此，这项工作为可用于多种应用的柔性 YIG 薄膜提供了可行的解决方案。