23 research outputs found
Preparation and characterization of Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8+δ</sub> thin films on MgO single crystal substrates by chemical solution deposition
No full textBi2Sr2CaCu2O8 thin films have been deposited on MgO single crystal substrates by spin-coating a solution based on 2-ethylhexanoate precursors. Pyrolysis takes place between 200 degrees C and 450 degrees C and is accompanied by the release of 2-ethylhexanoic acid, CO2 and H2O vapour. Highly c-axis oriented Bi2Sr2CaCu2O8 films were obtained after heat treatment at 840 degrees C in air. The highest T-c of 81 K was measured in a 10-layer film. Subsequent post-annealing in Ar and pure O-2 did not improve the superconducting properties of the films and resulted in the appearance of Bi2CaCuO5 or Bi-2(Sr, Ca)(2)CuO6 impurities. (C) 2013 Elsevier B.V. All rights reserved
Comparison of characteristics and nutritional adequacy of junior short distance and medium and long distance athletes
No full textInvestigation of the kinetics of catalytic decomposition of hydrogen peroxide depending on the solution phase state
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Pituitary?ovarian response to the gonadotrophin-releasing hormone-agonist test in anovulatory patients with polycystic ovary syndrome: predictive role of ovarian stroma
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