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TT: Tiefe Temperaturen

TT 14: Postersitzung III (Neue u. unkonventionelle Supraleiter, Anwendungen der Supraleitung, Dünne Schichten, JJs und SQUIDs, Schwere Fermionen, Kondo-Systeme)

TT 14.25: Poster

Mittwoch, 26. März 2003, 14:30–19:00, P2c

Quasiclassical Theory of Ferromagnet/Superconductor Bilayers — •Thomas Lück — Institut für Physik, Universität Augsburg, Augsburg, Germany

We solve the Eilenberger equation for ferromagnet/superconductor bilayers; the order parameter is determined selfconsistently. This allows us to study the critical temperature of such systems from the clean to the dirty limit. Moreover we examine the influence of a Fermi surface mismatch between the ferromagnet and the superconductor, which leads to a reduced transmission probability even for an ideal interface between both materials.

When increasing the thickness of the ferromagnetic layer the critical temperatures shows an oscillating behavior [1]. We find that both, the scattering strength and the Fermi surface mismatch, have strong influence on the critical temperature. Additionally we present the density of states in the superconducting state.

[1] L. R. Tagirov, Physica C 307, 145 (1998).