Spin-Polarized Electronic Transport through Ferromagnet/Organic-Inorganic Hybrid Perovskite Spinterfaces at Room Temperature

Organic-inorganic hybrid perovskites (OIHPs) have been explosively investigated mainly due to their potential applications in optoelectronics. Despite the electronic charge transport, phenomena regarding the spin-polarized electronic transport in OIHPs-based spintronic devices and the role of ferromagnet/OIHP spinterfaces remain unclear. In this work, the spin injection, accumulation, transport, and detection at room temperature for a vertical perovskite spin valve (PeSV) consisting of Ni/CH3NH3PbI3-xClx/Ni is reported. An in-plane anisotropic magnetoresistance (AMR) and a PeSV related magnetoresistance (MR) show remarkable magnetic switching behaviors due to the formation of Ni/CH3NH3PbI3-xClx spinterfaces, and the ferromagnetic coupling between two spin quantization axes of the spinterfaces. With assists of capacitance-frequency (C - - f) measurements under magnetic fields, the spin accumulation that occurs at the Ni/CH3NH3PbI3-xClx interface can be detected at the spin parallel (up arrow up arrow) and antiparallel (up arrow down arrow) configurations. Owing to a strong orbital interaction at the Ni/CH3NH3PbI3-xClx hybrid interface, the spin-sensitive electron paramagnetic spectroscopy (EPR) reveals significant change of the magnetic moment (mu). It is believed that the solution processed CH3NH3PbI3-xClx and the formation of the Ni/CH3NH3PbI3-xClx spinterface may hold an exceptionally important role for future hybrid optospintronic applications.