Title: Microwave Surface Resistance of Bi<sub> 2</sub>Sr<sub> 2</sub>CaCu<sub> 2</sub>O<sub>x</sub> Thick Films on Large-Area Metallic Substrates
Abstract:As a feasibility study for application of a high- T c material to an accelerator cavity, Bi 2 Sr 2 CaCu 2 O x thick films were formed on large-area metallic substrates. The microwave surface resistanc...As a feasibility study for application of a high- T c material to an accelerator cavity, Bi 2 Sr 2 CaCu 2 O x thick films were formed on large-area metallic substrates. The microwave surface resistance of the films was measured over a temperature range from 4.2 K to 300 K using a demountable cylindrical copper cavity operated at 3 GHz in the TE 011 mode. The area of the end plate was 177 cm 2 and the thickness of the films was around 50 µm. The films were formed either on silver foils (on copper) or on a silver plate, coated by either a screen-printing or a spray-coating method, sintered either in air or in a Bi 2 O 3 atmosphere, both at 885–890°C, and either annealed in nitrogen gas at 600°C or not annealed. The ratio of the microwave surface resistance of the best film to that of the copper was 0.18 at 10 K and 0.65 at 77.3 K. A comparison of the microwave surface resistance is made between Bi 2 Sr 2 CaCu 2 O x and YBa 2 Cu 3 O 7- x films.Read More
Publication Year: 1997
Publication Date: 1997-06-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 9
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