Point contact spectroscopy measurements have been performed on Nb/PdNi bilayers in which the thickness of the Nb layer, dNb, was kept constant at 40 nm while the thickness of PdNi, dPdNi, was changed from 2 to 9 nm. Features related to the superconducting gap induced in the ferromagnet have been observed in the dV=dI versus V curves. These structures show a non-monotonic behaviour as a function of dPdNi as a consequence of the damped oscillatory behaviour of the superconducting order parameter in the ferromagnetic layer.
Non-monotonic behaviour of the superconducting order parameter in Nb/PdNi bilayers observed through point contact spectroscopy
CIRILLO, CARLA;ATTANASIO, Carmine
2012
Abstract
Point contact spectroscopy measurements have been performed on Nb/PdNi bilayers in which the thickness of the Nb layer, dNb, was kept constant at 40 nm while the thickness of PdNi, dPdNi, was changed from 2 to 9 nm. Features related to the superconducting gap induced in the ferromagnet have been observed in the dV=dI versus V curves. These structures show a non-monotonic behaviour as a function of dPdNi as a consequence of the damped oscillatory behaviour of the superconducting order parameter in the ferromagnetic layer.File in questo prodotto:
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