High critical currents and flux creep effects in superconducting YBa2Cu3O7 - gd films e-gun deposited using a BaF2 source

P. H. Kes; P. Berghuis; S. Q. Guo; B. Dam; G. M. Stollman

doi:10.1016/0022-5088(89)90334-2

High critical currents and flux creep effects in superconducting YBa₂Cu₃O_{7 - gd} films e-gun deposited using a BaF₂ source

P. H. Kes^*, P. Berghuis, S. Q. Guo, B. Dam, G. M. Stollman

^*Corresponding author for this work

ChemE/Chemical Engineering

Research output: Contribution to journal › Article › Scientific › peer-review

17 Citations (Scopus)

Abstract

Resistance measurements are reported, carried out on highly textured thin films of YBa₂Cu₃O_{7 - gd} prepared by co-evaporation of BaF₂, copper and yttrium on (100) SrTiO₃ in a triple e-gun UHV system, adding oxygen during deposition. The polycrystalline films, with average grain size of the order of 10 μm, show a strong preferential orientation, with the c axis perpendicular to the substrate. The resistance measurements in a field parallel to the c axis have been interpreted in terms of a model combining thermally activated flux flow and flux pinning by twin boundaries. The agreement is satisfactory. The field and temperature dependence of the activation energy differs essentially from expressions proposed recently.

Original language	English
Pages (from-to)	325-331
Number of pages	7
Journal	Journal of The Less-Common Metals
Volume	151
Issue number	C
DOIs	https://doi.org/10.1016/0022-5088(89)90334-2
Publication status	Published - 15 May 1989

Bibliographical note

Funding Information:
Part of this work was supported by the Foundation for Fundamental Research on Matter (FOM) which in turn is sponsored by the Dutch Organization of Advancement of Research (NWO).

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title = "High critical currents and flux creep effects in superconducting YBa2Cu3O7 - gd films e-gun deposited using a BaF2 source",

abstract = "Resistance measurements are reported, carried out on highly textured thin films of YBa2Cu3O7 - gd prepared by co-evaporation of BaF2, copper and yttrium on (100) SrTiO3 in a triple e-gun UHV system, adding oxygen during deposition. The polycrystalline films, with average grain size of the order of 10 μm, show a strong preferential orientation, with the c axis perpendicular to the substrate. The resistance measurements in a field parallel to the c axis have been interpreted in terms of a model combining thermally activated flux flow and flux pinning by twin boundaries. The agreement is satisfactory. The field and temperature dependence of the activation energy differs essentially from expressions proposed recently.",

author = "Kes, {P. H.} and P. Berghuis and Guo, {S. Q.} and B. Dam and Stollman, {G. M.}",

note = "Funding Information: Part of this work was supported by the Foundation for Fundamental Research on Matter (FOM) which in turn is sponsored by the Dutch Organization of Advancement of Research (NWO).",

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doi = "10.1016/0022-5088(89)90334-2",

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T1 - High critical currents and flux creep effects in superconducting YBa2Cu3O7 - gd films e-gun deposited using a BaF2 source

AU - Kes, P. H.

AU - Berghuis, P.

AU - Guo, S. Q.

AU - Dam, B.

AU - Stollman, G. M.

N1 - Funding Information: Part of this work was supported by the Foundation for Fundamental Research on Matter (FOM) which in turn is sponsored by the Dutch Organization of Advancement of Research (NWO).

PY - 1989/5/15

Y1 - 1989/5/15

N2 - Resistance measurements are reported, carried out on highly textured thin films of YBa2Cu3O7 - gd prepared by co-evaporation of BaF2, copper and yttrium on (100) SrTiO3 in a triple e-gun UHV system, adding oxygen during deposition. The polycrystalline films, with average grain size of the order of 10 μm, show a strong preferential orientation, with the c axis perpendicular to the substrate. The resistance measurements in a field parallel to the c axis have been interpreted in terms of a model combining thermally activated flux flow and flux pinning by twin boundaries. The agreement is satisfactory. The field and temperature dependence of the activation energy differs essentially from expressions proposed recently.

AB - Resistance measurements are reported, carried out on highly textured thin films of YBa2Cu3O7 - gd prepared by co-evaporation of BaF2, copper and yttrium on (100) SrTiO3 in a triple e-gun UHV system, adding oxygen during deposition. The polycrystalline films, with average grain size of the order of 10 μm, show a strong preferential orientation, with the c axis perpendicular to the substrate. The resistance measurements in a field parallel to the c axis have been interpreted in terms of a model combining thermally activated flux flow and flux pinning by twin boundaries. The agreement is satisfactory. The field and temperature dependence of the activation energy differs essentially from expressions proposed recently.

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High critical currents and flux creep effects in superconducting YBa₂Cu₃O_{7 - gd} films e-gun deposited using a BaF₂ source

Abstract

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