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Regular version of the site

Book chapter

Superconducting FSF spin-valves with strong ferromagnetic elements

P. 89-90.
Pugach N., Eschrig M., Isidori A., Flokstra M. G., Cunningham T., Kim J., Satchell N., Burnell G., Bending S. J., Curran P. J., Langridge S. J., Kinane C., Cooper J., Lee S. L.

The theory and transport measurements are presented on superconducting spin-valve systems, where the controlled non-collinear arrangement of two ferromagnetic Co layers can be used to influence the superconducting state of Nb. We observe a very clear oscillation of the superconducting transition temperature (Tc) with the relative orientation of the two ferromagnetic layers. We report the formation of long-range triplet superconducting correlations (LRTC) according to our theory. Singlet BCS correlations is shown to lead to a weak enhancement of Tc for the anti-parallel configuration of exchange fields, while much larger changes are observed for other configurations, which can be attributed to drainage currents due to LRTC formation.

In book

Edited by: С. Гапонов, З. Красильник Т. 1. Н. Новгород: Издательство Нижегородского государственного университета им. Н.И. Лобачевского, 2015.