1999/12/17 by Miodrag L. Kulic, Miodrag L. Kulić, Martin Endres
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat
paper · pdf · doi:10.1103/physrevb.62.11846
14 pages, 3 figures
arxiv created 1999/12/17 · openalex publication_date 2000/11/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We consider thin superconducting (S) films of thickness d\ensuremath≪\ensuremathξ0, sandwiched between two ferromagnetic semiconducting insulators (FI) with differently orientated magnetizations---the FI\ensuremath-S\ensuremath-FI system. We calculate the dependence of the superconducting critical temperature on the orientation of the magnetization in the insulators and on the thickness of the superconducting film. The calculations are done for singlet as well as triplet superconductors. In the singlet case Tc depends on the relative orientation of the left and right magnetization only, while in the triplet case Tc depends on the absolute orientation of magnetization. The latter property can serve as a kind of spin spectroscopy of triplet and unconventional superconductors, for instance in resolving the structure of the triplet order parameter in the recently discovered layered superconductor Sr2RuO4. The possibility of logic circuits and switches, which are based on the FI\ensuremath-S\ensuremath-FI systems with arbitrary orientation of magnetizations in FI films, is analyzed too.