Enhanced spin accumulation in a superconductor

Abstract

A lateral array of ferromagnetic tunnel junctions is used to inject and detect non-equilibrium quasi-particle spin distribution in a superconducting strip made of Al. The strip width and thickness is kept below the quasi particle spin diffusion length in Al. Non-local measurements in multiple parallel and antiparallel magnetic states of the detectors are used to in-situ determine the quasi-particle spin diffusion length. A very large increase in the spin accumulation in the superconducting state compared to that in the normal state is observed and is attributed to a diminishing of the quasi-particle population by opening of the gap below the transition temperature.

6 pages, 4 figures; accepted for publication in Journal of Applied Physics

References in corpus (2)

• Spin Injection and Detection in Magnetic Nanostructures
• Spin relaxation in mesoscopic superconducting Al wires

Cited by in corpus (5)

• Nonlocal Electronic Spin Detection, Spin Accumulation and the Spin Hall effect
• Spin injection and relaxation in a mesoscopic superconductor
• Nonlocal supercurrent in mesoscopic multiterminal SNS Josephson junction in the low-temperature limit
• Nonlocal spin Hall effect and spin-orbit interaction in nonmagnetic metals
• Spin Injection and Detection in a Mesoscopic Superconductor at Low Temperatures