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We present differential conductance measurements of Cobalt / Cobalt-Oxide /Indium planar junctions, 500nm x 500nm in size. The junctions span a wide rangeof barriers, from very low to a tunnel barrier. The characteristic conductanceof all the junctions show a V-shape structure at low bias instead of theU-shape characteristic of a s-wave order parameter. The bias of the conductancepeaks is, for all junctions, larger than the gap of indium. Both propertiesexclude pure s-wave pairing. The data is well fitted by a model that assumesthe coexistence of s-wave singlet and equal spin p-wave triplet fluids. We findthat the values of the s-wave and p-wave gaps follow the BCS temperaturedependance and that the amplitude of the s-wave fluid increases with thebarrier strength.

Coexistence of a triplet nodal order-parameter and a singlet order-parameter at the interfaces of ferromagnet-superconductor Co/CoO/In junctions