Spin accumulation probed in multiterminal lateral all-metallic devices

Abstract

We study spin accumulation in an aluminium island, in which the injection of a spin current and the detection of the spin accumulation are done by means of four cobalt electrodes that connect to the island through transparent tunnel barriers. Although the four electrodes are designed as two electrode pairs of the same shape, they nonetheless all exhibit distinct switching fields. As a result the device can have several different magnetic configurations. From the measurements of the amplitude of the spin accumulation, we can identify these configurations, and using the diffusion equation for the spin imbalance, we extract the spin relaxation length ${\lambda }_{\mathrm{sf}}=400\pm 50$~nm and an interface spin current polarization $P=(10\pm 1)$ at low temperature and ${\lambda }_{\mathrm{sf}}=350\pm 50$~nm, $P=(8\pm 1)$ at room temperature.

References in corpus (7)

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• Evidence for crossed Andreev reflection in superconductor-ferromagnet hybrid structures
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• Zero-dimensional spin accumulation and spin dynamics in a mesoscopic metal island
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• Spin-Diffusion Lengths in Metals and Alloys, and Spin-Flipping at Metal/Metal Interfaces: an Experimentalist's Critical Review
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• Lateral Spin Injection in Germanium Nanowires
• Enhanced spin accumulation at room temperature in graphene spin valves with amorphous carbon interfacial layers
• Spin-Valve Effect of the Spin Accumulation Resistance in a Double Ferromagnet - Superconductor Junction
• Spin dependent transport characterization in metallic lateral spin valves using 1D and 3D modeling
• Effect of ferromagnetic contacts on spin accumulation in an all-metallic lateral spin-valve system: Semiclassical spin drift-diffusion equations
• Correlating spin transport and electrode magnetization in a graphene spin valve: simultaneous magnetic microscopy and non-local measurements
• Vertical Spin Transport in Al with Pd/Al/Ni80Fe20 Trilayer Films at Room Temperature by Spin Pumping