Angular Dependence of the Superconducting Transition Temperature in Ferromagnet-Superconductor-Ferromagnet Trilayers

Abstract

The superconducting transition temperature, $T_c$, of a ferromagnet (F) - superconductor (S) - ferromagnet trilayer depends on the mutual orientation of the magnetic moments of the F layers. This effect has been previously observed in F/S/F systems as a $T_c$ difference between parallel and antiparallel configurations of the F layers. Here we report measurements of $T_c$ in CuNi/Nb/CuNi trilayers as a function of the angle between the magnetic moments of the CuNi ferromagnets. The observed angular dependence of $T_c$ is in qualitative agreement with a F/S proximity theory that accounts for the odd triplet component of the condensate predicted to arise for non-collinear orientation of the magnetic moments of the F layers.

4 + εpages including 4 figures. To appear in Phys. Rev. Lett

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• Observation of spin-triplet superconductivity in Co-based Josephson Junctions
• Magnetization-dependent $T_c$ shift in F/S/F trilayers with a strong ferromagnet
• Triplet proximity effect in FSF trilayers
• Odd Triplet Pairing in clean Superconductor/Ferromagnet heterostructures
• Full spin switch effect for the superconducting current in a superconductor/ferromagnet thin film heterostructure
• Induced Triplet Pairing in clean s-wave Superconductor/Ferromagnet layered structures
• Thermodynamics and Phase Diagrams of layered superconductor/ferromagnet nanostructures

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