Dynamic spin injection into chemical vapor deposited graphene

作者：Patra A K; Singh S; Barin B; Lee Y; Ahn J H; del Barco E^*; Mucciolo E R; Oezyilmaz B

来源：Applied Physics Letters, 2012, 101(16): 162407.

DOI：10.1063/1.4761932

We demonstrate dynamic spin injection into chemical vapor deposition (CVD) grown graphene by spin pumping from permalloy (Py) layers. Ferromagnetic resonance measurements at room temperature reveal a strong enhancement of the Gilbert damping at the Py/graphene interface, indeed exceeding that observed in Py/platinum interfaces. Similar results are also shown on Co/graphene layers. This enhancement in the Gilbert damping is understood as the consequence of spin pumping at the interface driven by magnetization dynamics. Our observations suggest a strong enhancement of spin-orbit coupling in CVD graphene, in agreement with earlier spin valve measurements.

• 出版日期2012-10-15