▎ 摘　　要

Spin injection, spin accumulation and spin detection have been investigated in few-layer graphene lateral spin valves at room temperature. Compared to the zero value of spin accumulation signal in Co/Graphene/Co lateral spin valve even after thermal treatment, clear spin accumulation signals were observed in Co/MgO/Graphene/ MgO/Co lateral spin valve after 270 degrees C thermal annealing. Our finding provides a robust way to achieve the spin injection in graphene lateral spin valves.