Superconductivity in Pb cluster assembled systems with different degrees of coagulation

J. Cuppens; C. P. Romero; P. Lievens; M. J. Van Bael

doi:10.1103/PhysRevB.81.064517

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Superconductivity in Pb cluster assembled systems with different degrees of coagulation

J. Cuppens, C. P. Romero, P. Lievens, M. J. Van Bael

DOI 10.1103/PhysRevB.81.064517 · Physical Review B

T1

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Abstract

Superconducting properties are observed and investigated in Pb nanogranular systems prepared by deposition of clusters produced in a laser vaporization cluster source. Different morphologies were achieved by controlling the degree of coagulation via the substrate temperature and the magnetic response of these systems was studied. Deposition on substrates at temperatures above 200 °C results in an ensemble of weakly coupled islands showing superconducting confinement effects. Cluster deposition on cooled substrates limits the coagulation and results in cluster assembled thin films with strong intergrain coupling. This method provides a unique way to produce systems with very high flux pinning leading to avalanche effects.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	7.2	Pressure not reported	unknown