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Investigation of the Interface Between a Normal Metal and High Temperature Superconductor

Ashworth, S. P. / Beduz, C. / Harrison, K. / Scurlock, R. G. / Yang, Y.

Abstract Data are presented on the contact resistance between YBCO and arc sprayed silver and copper. Contact resistivities of 3.4 × 10-7 Ωcm2 (Ag on YBCO) and 6 × 10-3 Ωcm2 (Cu on YBCO)) are obtained at 80K without annealing. With annealing, Ag on YBCO resistivities of 10-9 Ωcm2 are obtained. A new technique for measuring these very low contact resistances is outlined. Measurements on Cu and Ag spray coatings on a 10 molar% Ag on YBCO matrix were also carried out, the addition of Ag to YBCO reduced the Cu contact resistivity. These results are interpreted in terms of a percolative Ag path allowing current to bypass a degraded surface region of YBCO.

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Investigation of the Interface Between a Normal Metal and High Temperature Superconductor

Ashworth, S. P. / Beduz, C. / Harrison, K. / Scurlock, R. G. / Yang, Y.

Abstract Data are presented on the contact resistance between YBCO and arc sprayed silver and copper. Contact resistivities of 3.4 × 10-7 Ωcm2 (Ag on YBCO) and 6 × 10-3 Ωcm2 (Cu on YBCO)) are obtained at 80K without annealing. With annealing, Ag on YBCO resistivities of 10-9 Ωcm2 are obtained. A new technique for measuring these very low contact resistances is outlined. Measurements on Cu and Ag spray coatings on a 10 molar% Ag on YBCO matrix were also carried out, the addition of Ag to YBCO reduced the Cu contact resistivity. These results are interpreted in terms of a percolative Ag path allowing current to bypass a degraded surface region of YBCO.

Investigation of the Interface Between a Normal Metal and High Temperature Superconductor

Ashworth, S. P. / Beduz, C. / Harrison, K. / Scurlock, R. G. / Yang, Y.

Abstract Data are presented on the contact resistance between YBCO and arc sprayed silver and copper. Contact resistivities of 3.4 × 10-7 Ωcm2 (Ag on YBCO) and 6 × 10-3 Ωcm2 (Cu on YBCO)) are obtained at 80K without annealing. With annealing, Ag on YBCO resistivities of 10-9 Ωcm2 are obtained. A new technique for measuring these very low contact resistances is outlined. Measurements on Cu and Ag spray coatings on a 10 molar% Ag on YBCO matrix were also carried out, the addition of Ag to YBCO reduced the Cu contact resistivity. These results are interpreted in terms of a percolative Ag path allowing current to bypass a degraded surface region of YBCO.

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Titel:

Investigation of the Interface Between a Normal Metal and High Temperature Superconductor

Beteiligte:

Ashworth, S. P. (Autor:in) / Beduz, C. (Autor:in) / Harrison, K. (Autor:in) / Scurlock, R. G. (Autor:in) / Yang, Y. (Autor:in)

Erschienen in:

Advances in Cryogenic Engineering Materials ; 439-445

An International Cryogenic Materials Conference Publication ; 36

Erscheinungsdatum:

01.01.1990

Format / Umfang:

7 pages

ISBN:

978-1-4613-9882-0 , 978-1-4613-9880-6

ISSN:

DOI:

https://doi.org/10.1007/978-1-4613-9880-6_56

Medientyp:

Aufsatz/Kapitel (Buch)

Format:

Elektronische Ressource

Sprache:

Englisch

Schlagwörter:

Contact Resistance , Normal Metal , Contact Resistivity , Bulk Resistivity , Bulk Superconductor Chemistry , Biochemical Engineering , Characterization and Evaluation of Materials , Mechanical Engineering

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