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Enhancing Sunlight Control of Interfacial Magnetism by Introducing the ZnO Layer for Electron Harvesting
Yifan Zhao1, Meng Zhao1, Bian Tian2
1Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic and Information Engineering, and State Key Laboratory for Mechanical Behavior of Materials, the International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi'an Jiaotong University, Xi'an 710049, China.
Abstract:
Recently, researchers have developed photovoltaic (PV) control of magnetism to provide a new way of manipulating spin states in an energy-effective manner, where the capability of magnetism manipulation is crucial. Here, we established a PV heterostructure of Pt/PV/ZnO/Co/Si to realize sunlight control of magnetism, where the ZnO layer is introduced to enhance the electron transportation as well as the interfacial optical-electromagnetic tunability. Compared to the PV heterostructure without the ZnO layer (245 Oe), a much greater ferromagnetic resonance shift (1149 Oe) and a saturated magnetization reduction (12.7%) were obtained with the optimal ZnO inserting layer under sunlight illumination. These results prove that the ZnO layer plays a key role in optimizing magnetic manipulation and opening a door toward PV spintronics in the future.
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