Far infrared reflectivity of Tl2Ba2CaCu2O8 and YBa2Cu3O7 ceramics and of an oriented YBa2Cu3O7 thin film
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چکیده
منابع مشابه
architecture and engineering of nanoscale sculptured thin films and determination of their properties
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15 صفحه اولGrain Boundary Induced Magneto-Far Infrared Resonances in Superconducting YBa2Cu3O7−δ Thin Films
Spectral features induced by 45 in-plane misoriented grains have been observed in the far infrared magneto-transmission of YBa2Cu3O7−δ thin films. Two strong dispersive features are found at 80 and 160 cm−1 and a weaker one at 116 cm−1. The data can be well represented by Lorentzian oscillator contributions to the conductivity. Several possible interpretations are discussed. We conclude that th...
متن کاملEFFECT OF O2 PARTIAL PRESSURE ON YBa2Cu3O7–δ THIN FILM GROWTH BY PULSED LASER DEPOSITION
YBa2Cu3O7 d thin films were processed by pulsed laser deposition on (1 0 0) LaAlO3 substrates using O2 partial pressures from 120 to 1200 mTorr. The effect of O2 pressure on film properties including room temperature resistivities and microstructures was studied for a unique set of deposition parameters. The film quality was observed to remain high over a wide range of O2 partial pressures, wit...
متن کاملEFFECTS OF EPITAXIAL STRAIN ON THE GROWTH MECHANISM OF YBa2Cu3O7−x THIN FILMS IN [YBa2Cu3O7−x/PrBa2Cu3O7−x] SUPERLATTICES
We report on the growth mechanism of YBa2Cu3O7−x. Our study is based on the analysis of ultrathin, YBa2Cu3O7−x layers in c-axis oriented YBa2Cu3O7−x / PrBa2Cu3O7 superlattices. We have found that the release of epitaxial strain in very thin YBCO layers triggers a change in the dimensionality of the growth mode. Ultrathin, epitaxially strained, YBCO layers with thickness below 3 unit cells grow ...
متن کاملdevelopment and implementation of an optimized control strategy for induction machine in an electric vehicle
in the area of automotive engineering there is a tendency to more electrification of power train. in this work control of an induction machine for the application of electric vehicle is investigated. through the changing operating point of the machine, adapting the rotor magnetization current seems to be useful to increase the machines efficiency. in the literature there are many approaches wh...
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ژورنال
عنوان ژورنال: Infrared Physics
سال: 1989
ISSN: 0020-0891
DOI: 10.1016/0020-0891(89)90127-9