Angular dependence of the superconducting transition temperature in ferromagnet-superconductor-ferromagnet trilayers |
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Authors: | Zhu Jian Krivorotov Ilya N Halterman Klaus Valls Oriol T |
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Affiliation: | Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA. |
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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 noncollinear orientation of the magnetic moments of the F layers. |
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