title: Vertical graphene spin valves based on La(2/3)Sr(1/3)MnO(3) electrodes.
abstract: We report the fabrication of the La2/3Sr1/3MnO3 (LSMO)/graphene/Co sandwich structures employing single-layer graphene as the interlayer. Appreciable negative spin valve signals were observed from room temperature to 5 K. We find that the devices demonstrate nonlinear current-voltage (I-V) characteristics around room temperature, indicating that the tunneling effect is dominated rather than the Ohmic property. However, I-V curves exhibit evident linear behavior at low temperatures, which reveal the Ohmic characteristic. The vertical graphene spin valves using LSMO electrode have potential application in memory storage and logic operation.
authors.affiliation: High Magnetic Field Laboratory, Chinese Academy of Sciences , Hefei 230031, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Li
authors.forename: Tian
authors.initials: T
authors.lastname: Li
authors.forename: Xinyi
authors.initials: X
authors.lastname: Guo