Paracoherence in polycrystalline La1.8Sr0.2CuO4-δ

We have studied the resistive transition into the superconducting state of single phase polycrystalline La1.8Sr0.2CuO4-δ samples, in a magnetic field range below 50 Oe. We find that at zero field and near the zero resistivity temperature the transition is well described as dissipation due to thermal...

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Autores principales: Levy, Pablo Eduardo, Acha, Carlos Enrique, Bekeris, Victoria Isabel
Publicado: 1991
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00381098_v80_n10_p849_Levy
http://hdl.handle.net/20.500.12110/paper_00381098_v80_n10_p849_Levy
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00381098_v80_n10_p849_Levy
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spelling paper:paper_00381098_v80_n10_p849_Levy2023-06-08T15:03:03Z Paracoherence in polycrystalline La1.8Sr0.2CuO4-δ Levy, Pablo Eduardo Acha, Carlos Enrique Bekeris, Victoria Isabel We have studied the resistive transition into the superconducting state of single phase polycrystalline La1.8Sr0.2CuO4-δ samples, in a magnetic field range below 50 Oe. We find that at zero field and near the zero resistivity temperature the transition is well described as dissipation due to thermally induced phase fluctuations in neighbour superconducting grains. We find that the excess conductivity above the conductivity of the intergranular junctions displays critical behavior with unique critical exponent in four samples, independent of method of preparation, oxygen content and applied magnetic field; the obtained value, γ=2.0±0.1 differs from previously reported values for polycrystalline YBa2Cu3O7-y. In this description, increasing magnetic fields, enhance the granular behaviour of polycrystalline La1.8Sr0.2CuO4-δ as compared with previous results on samples with induced granularity. © 1991. Fil:Levy, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Acha, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bekeris, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1991 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00381098_v80_n10_p849_Levy http://hdl.handle.net/20.500.12110/paper_00381098_v80_n10_p849_Levy
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description We have studied the resistive transition into the superconducting state of single phase polycrystalline La1.8Sr0.2CuO4-δ samples, in a magnetic field range below 50 Oe. We find that at zero field and near the zero resistivity temperature the transition is well described as dissipation due to thermally induced phase fluctuations in neighbour superconducting grains. We find that the excess conductivity above the conductivity of the intergranular junctions displays critical behavior with unique critical exponent in four samples, independent of method of preparation, oxygen content and applied magnetic field; the obtained value, γ=2.0±0.1 differs from previously reported values for polycrystalline YBa2Cu3O7-y. In this description, increasing magnetic fields, enhance the granular behaviour of polycrystalline La1.8Sr0.2CuO4-δ as compared with previous results on samples with induced granularity. © 1991.
author Levy, Pablo Eduardo
Acha, Carlos Enrique
Bekeris, Victoria Isabel
spellingShingle Levy, Pablo Eduardo
Acha, Carlos Enrique
Bekeris, Victoria Isabel
Paracoherence in polycrystalline La1.8Sr0.2CuO4-δ
author_facet Levy, Pablo Eduardo
Acha, Carlos Enrique
Bekeris, Victoria Isabel
author_sort Levy, Pablo Eduardo
title Paracoherence in polycrystalline La1.8Sr0.2CuO4-δ
title_short Paracoherence in polycrystalline La1.8Sr0.2CuO4-δ
title_full Paracoherence in polycrystalline La1.8Sr0.2CuO4-δ
title_fullStr Paracoherence in polycrystalline La1.8Sr0.2CuO4-δ
title_full_unstemmed Paracoherence in polycrystalline La1.8Sr0.2CuO4-δ
title_sort paracoherence in polycrystalline la1.8sr0.2cuo4-δ
publishDate 1991
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00381098_v80_n10_p849_Levy
http://hdl.handle.net/20.500.12110/paper_00381098_v80_n10_p849_Levy
work_keys_str_mv AT levypabloeduardo paracoherenceinpolycrystallinela18sr02cuo4d
AT achacarlosenrique paracoherenceinpolycrystallinela18sr02cuo4d
AT bekerisvictoriaisabel paracoherenceinpolycrystallinela18sr02cuo4d
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