The inexorable trend of spintronics is to develop efficient spin-control methods. For example, photovoltaic spintronics driven by sunlight has great potential in energy-saving applications. Here, a ferromagnetic/PV heterojunction is prepared on Si-substrate as Ta (4 nm)/Co (1 nm)/ZnO (from 10 to 58 nm)/PTB7-Th: PC₇₁BM/Pt (3 nm) to study how visible light affected magnetic dynamics. A linewidth variation as high as 812.55 Oe is achieved by optimizing the thickness of ZnO film used to enhance the electron transfer. Due to the photovoltaic effect, reversible ferromagnetic resonance (FMR) linewidth switches are displayed, which is attributed to the 3d orbitals occupancy of Co induced the TMS contribution and inhomogeneous broadening. This work proposes a sunlight controllable magnetic damping heterostructure for developing fast, small, energy-efficient spintronics applications.

中文翻译：

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光伏/铁磁异质结构中铁磁阻尼的阳光控制

自旋电子学的必然趋势是开发有效的自旋控制方法。例如，由太阳光驱动的光伏自旋电子学在节能应用方面具有巨大潜力。在这里，铁磁/PV 异质结在 Si 衬底上制备为 Ta (4 nm)/Co (1 nm)/ZnO（从 10 到 58 nm）/PTB7-Th：PC ₇₁BM/Pt (3 nm) 研究可见光如何影响磁动力学。通过优化用于增强电子转移的 ZnO 薄膜的厚度，可以实现高达 812.55 Oe 的线宽变化。由于光伏效应，显示了可逆铁磁共振 (FMR) 线宽开关，这归因于 Co 的 3d 轨道占据引起 TMS 贡献和不均匀展宽。这项工作提出了一种阳光可控的磁阻尼异质结构，用于开发快速、小型、节能的自旋电子学应用。