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A study of the superconducting properties of YBa2Cu(9-x)Nb(x)O(y) thin filmsEffect of Niobium substitution at the copper site in YBa2Cu3O(7-x) was studied in thin film form. The films were deposited by laser ablation technique using the targets of the YBa2Cu(3-x)Nb(x)O(y) where x = 0.0, 0.025, 0.05, 0.1, 0.2, 0.4, 0.8 and 1.0 under identical deposition conditions on SrTiO3 (100) substrates. Films were characterized by XRD, resistivity, I-V and J(sub c) measurements. Films made from x = 0.025 and 0.05 concentrations of Nb substituted targets showed relatively improved superconducting properties compared to that of undoped films. the best J(sub c) realized for x - 0.025 Nb concentration was 1.8 x 10(exp 6) A/sq cm and for 0.05 Nb concentration it was 3.2 x 10(exp 6) A/sq cm at 77 K. However, degradation of the superconducting properties, with the increase of x is greater than or equal to 0.1 Nb concentration and drastic suppression and complete loss of superconductivity was noticed for x is greater than or equal to 0.4. The growth of impurity phase YBa2NbO6 for x = 0.1 and above of Nb concentration was noted from XRD (X-Ray Diffraction) patterns. However, the site occupancy of Nb could not be confirmed from these studies.
Document ID
19960000312
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Srinivas, S. (Hyderabad Univ. India)
Bhatnagar, A. K. (Hyderabad Univ. India)
Pinto, R. (Eidgenoessische Technische Hochschule Zurich, Switzerland)
Pai, S. P. (Eidgenoessische Technische Hochschule Zurich, Switzerland)
Apte, P. R. (Eidgenoessische Technische Hochschule Zurich, Switzerland)
Purandare, S. C. (Eidgenoessische Technische Hochschule Zurich, Switzerland)
Dsousa, C. P. (Eidgenoessische Technische Hochschule Zurich, Switzerland)
Date Acquired
September 6, 2013
Publication Date
April 1, 1995
Publication Information
Publication: NASA. Johnson Space Center, Proceedings of the 4th International Conference and Exhibition: World Congress on Superconductivity, Volume 2
Subject Category
Solid-State Physics
Accession Number
96N10312
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19960000272Collected WorksProceedings of the 4th International Conference and Exhibition: World Congress on Superconductivity, Volume 2
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