“…The ever-rising demand for smaller, faster, lower-power consumption spintronic devices, where the spin is the information carrier, keeps increasing rapidly. − The way of regulating spins in these devices is crucial; however, the traditional current-driven methods have high-energy consumption. − Moreover, the voltage control of magnetism through the piezo/ferroelectric layer , or ionic liquid − still suffers from problems such as material growth, substrate clamping effect, interfacial chemical reactions, long response time, and so forth. Recently, researchers have developed photovoltaic (PV) control of magnetism in PV/ferromagnetic (FM) metals or oxide heterojunctions, where the photo-induced electrons are generated in the PV layer, transferred into the FM layer, and then changed the FM properties via shifting its Fermi level. − Compared with other magnetic regulation methods, the PV control of magnetism is fast, energy-efficient, clean, and easy to integration.…”