Superconductivity in Pb cluster assembled systems with different degrees of coagulation

被引：18

作者：

Cuppens, J.

Romero, C. P.

Lievens, P.

Van Bael, M. J. ^{[1
]}

机构：

[1] Katholieke Univ Leuven, Lab Solid State Phys & Magnetism, B-3001 Heverlee, Belgium

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 06期

关键词：

GRANULAR SUPERCONDUCTORS; HARD SUPERCONDUCTORS; CRITICAL-FIELD; FILMS; PARTICLES; NANOCLUSTERS; COALESCENCE; TRANSITION; MORPHOLOGY; INSULATOR;

D O I：

10.1103/PhysRevB.81.064517

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 degrees 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.

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页数：7

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