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Layer sequence dependence of the superconducting critical temperature in the Nb/Pd proximity system

DOI: 10.1103/PhysRevB.76.014534 DOI Help

Authors: A. Potenza (Diamond Light Source) , M. S. Gabureac (University of Leeds) , C. Marrows (University of Leeds)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 76 (1)

State: Published (Approved)
Published: July 2007

Abstract: We have studied the superconducting properties of sputtered bilayer thin films of Nb and Pd. The superconducting proximity effect suppresses the critical temperature TC of these bilayer systems. Here, we report that this suppression shows a marked layer-sequence dependence: the suppression is larger for a Nb layer capped with Pd rather than buffered by it. We interpret our data in terms of a theoretical model of the proximity effect that takes into account finite interface transparency, and explain this effect as arising due to different levels of disorder in the Pd layer. We believe the same proximity induced effect could also appear in other studies and will also affect ferromagnet/superconductor/ferromagnet structures.

Subject Areas: Physics

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Added On: 08/07/2010 13:33

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