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J Phys Condens Matter. 2012 Feb 29;24(8):083201. doi: 10.1088/0953-8984/24/8/083201.

Quasiparticle relaxation mechanisms in superconductor/ferromagnet bilayers.

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  • 1CNR-SPIN Salerno and Dipartimento di Fisica E R Caianiello, Università degli Studi di Salerno, Fisciano (Sa), Italy.


In this paper we review some recent results obtained on superconducting/ferromagnetic (S/F) structures when measuring the dynamic instabilities of the vortex lattice at high driving currents. The role played on the non-equilibrium properties of the hybrids by both the ferromagnetic and the superconducting materials has been analyzed with a special focus on the values and the temperature dependence of the quasiparticle relaxation times, τ(E). Knowledge of the relaxation mechanisms in these systems is extremely important in view of possible applications since it can drive the optimal choice of both materials to realize, in particular, ultrafast superconducting single photon detectors based on S/F hybrid structures.

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