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Your search keyword '"Sharping, J.E."' showing total 2 results
Start Over Author "Sharping, J.E." Topic high temperature superconductors -- research
2 results on '"Sharping, J.E."'

1. Current transport across grain boundaries in TlBa2Ca2Cu3Ox thick polycrystalline films and YBa2Cu3O7 step edges

Author

Hettinger, J.D., Kim, D.H., Miller, D.J., Hu, J.G., Gray, K.E., Sharping, J.E., Daly, K., Pettiette-Hall, C., Tkaczyk, J.E., and Deluca, J.

Subjects
Copper oxide superconductors -- Research, Thick films -- Research, High temperature superconductors -- Research, Polycrystalline semiconductors -- Research, Yttrium barium copper oxides -- Research, Business, Electronics, Electronics and electrical industries
Abstract

A microstructural characterization was made on YBa2Cu3O7 samples prepared by on a step-edged substrate as well as TlBa2Ca2Cu3Ox (Tl-1223) polycrystalline films with single grain boundaries. The study investigated the activation energy via measurements of current conduction across each material's grain boundaries. It revealed the influence of a polycrystalline's grain boundaries on the negative curvature of the Tl-1223 sample.

Published
1993

2. Effect of substrate-twin-induced microstructure on transport properties of epitaxial Tl2Ba2CaCu2Ox films in a magnetic field

Author

Kim, D.H., Miller, D.J., Hettinger, J.D., Gray, K.E., Landis, P.G., and Sharping, J.E.

Subjects
Copper oxide superconductors -- Research, Thin films -- Magnetic properties, High temperature superconductors -- Research, Business, Electronics, Electronics and electrical industries
Abstract

The impact of a substrate's geometry on the microsructural development and superconducting characteristics of epitaxial Tl2Ba2CaCu2Ox thin films prepared on LaAlO3 and SrTiO3 is studied. The experiment measured the films's critical current density and resistivity for magnetic fields parallel to the substrate twins. It reveals the occurence of resistivity drops and higher critical current density at fields above 2 T for the LaAlO3-grown films.

Published
1993

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