Related Articles Structure, magnetic, and electronic properties of hydrogenated two-dimensional diamond films Appl. Phys. Lett. 102, 073114 (2013) Thermally activated magnetization switching in a nanostructured synthetic ferrimagnet J. Appl. Phys. 113, 063914 (2013) Probing nanowire edge roughness using an extended magnetic domain wall Appl. Phys. Lett. 102, 062409 (2013) Reversal process of a magnetic vortex core under the combined action of a perpendicular field and spin transfer torque Appl. Phys. Lett. 102, 062401 (2013) Stripe-vortex transitions in ultrathin magnetic nanostructures J. Appl. Phys. 113, 054312 (2013) Additional information on Appl. Phys. Lett.

No abstract

A different type lateral spin valve structure consisting of a pair of the closely located Permalloy nanopillars on a uniform copper film has been developed. From the bias-current and temperature dependences of the spin signal, the nanopillar lateral spin valve was found to have several advantages for generating the pure spin current over the conventional lateral spin valves. We also show that the limitation of the generating spin current can be enhanced by increasing the number of the spin injectors.

Two advantages of the lateral spin valve using multi-terminal spin injections have been demonstrated. First, the effective spin polarization for the pure spin current can be controlled by the two anti-parallely aligned spin injectors. We show that the magnitude and the sign of the spin polarization are electrically manipulated by adjusting the current ratio between two injectors. Secondly, we show that the giant pure spin current can be generated by the nonlolcal spin injections from the quadruple spin injectors.