Figure 3: Long-distance spin transport in CVD graphene device at room temperature.
From: Long distance spin communication in chemical vapour deposited graphene
(a) NL spin valve signal with channel length L=16 μm with in-plane magnetic field (B‖) sweep as depicted in the figure. The high and low values of NL resistance RNL correspond to the parallel (↑↑ or ↓↓) and antiparallel (↑↓ or ↓↑) configurations of the ferromagnetic injector (Inj) and detector (Det) electrodes, respectively. The blue and red colours indicate the direction of magnetic field sweep as represented by the arrows with respective colours. (b) NL Hanle spin precession signal obtained by a perpendicular magnetic field (B⊥) sweep in parallel configuration (↑↑) of ferromagnetic electrodes for L=16 μm graphene channel. The raw data points are fitted with the Hanle equation, to extract spin lifetime τs and spin diffusion constant Ds.
