Abstract
We review recent experimental and theoretical progress in the physics of the proximity effect in thin film structures combined of superconducting (S) and ferromagnetic (F) layers with special emphasis on the occurrence of odd triplet superconductivity. In the theoretical works it has been shown that a long range odd triplet component (LRTC) of the superconducting condensate function can appear at S/F interfaces, if the magnetization of F is inhomogeneous. In Josephson junctions of the type S/F/S the ferromagnetic barriers must have an internal F\(^{\prime}\)/S/F\(^{\prime}\) structure with the magnetization direction of F\(^{\prime }\) rotated with respect to the magnetization direction of F in order to create a superconducting LRTC current. Recent experiments are in accord with these predictions. The experimental progress concerning the realization of superconducting spin valves and recent experiments proving the existence of the inverse proximity effect are also reviewed.
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Acknowledgments
The authors are grateful for support by the (DFG) within SFB 491. One of us (IAG) would like to acknowledge partial financial support from the Russian Foundation for Basic Research (Grant No. 11-02-01063à).
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Efetov, K.B., Garifullin, I.A., Volkov, A.F., Westerholt, K. (2013). Spin-Polarized Electrons in Superconductor/Ferromagnet Hybrid Structures. In: Zabel, H., Farle, M. (eds) Magnetic Nanostructures. Springer Tracts in Modern Physics, vol 246. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-32042-2_3
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