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Type: Artigo de evento
Title: Coherence And Fluctuation In 3d Networks: The Superconducting Behavior Of Nb Particles Embedded In A Cu Matrix
Author: De Almeida R.L.
Coelho A.A.
De Lima O.F.
Abstract: We show the preparation and properties of granular samples formed by a regular distribution of spherical Nb particles, about 2 μm in diameter, embedded in a Cu matrix. Measurements of magnetization, resistance and V×I curves show clearly the combined superconducting behavior of the weak coupling and bulk regimes. Our results are interpreted using an effective medium model for the Josephson coupling in a 3D array of grains. In special we have observed the predicted small oscillations in the critical current, measured as a function of the applied magnetic field. © 2004 Elsevier B.V. All rights reserved.
Rights: fechado
Identifier DOI: 10.1016/j.physc.2004.03.083
Date Issue: 2004
Appears in Collections:Unicamp - Artigos e Outros Documentos

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