2012/01/14 by K. -V. Pham, Khuôn-Viêt Pham, Pham, K. -V.
Computer Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic properties of thin films #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Quantum and electron transport phenomena #Quantum-Dot Cellular Automata #cond-mat.mes-hall
paper · pdf · doi:10.48550/arxiv.1201.2982
arxiv created 2012/01/14 · openalex publication_date 2012/01/14 · arxiv updated 2012/01/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We consider a non-local spin valve in a Van der Pauw cross geometry with four ferromagnetic electrodes. Two antiparallel ferromagnets are used as (charge) source and drain while the detector circuit involves measuring the voltage between two collinear ferromagnets with parallel or antiparallel magnetizations. We find a potentially large increase of the non-local spin voltage. The setup displays several additional interesting properties: (i) infinite GMR for the non-local resistance (if a symmetry requirement for the device is met); (ii) ON-OFF switch effect, when the injector electrodes are parallel instead of antiparallel; (iii) insensitivity to offset voltages. The device can additionally be used as a Direct Spin Hall Effect probe and as a reprogrammable magneto-logic gate implementing basic operations (NOR, NAND, inverter, AND, OR,...).