ISSN:
1572-9605
Keywords:
YBa2Cu3O7−x preparation techniques
;
microwave surface resistance
;
measurement sensitivity
Source:
Springer Online Journal Archives 1860-2000
Topics:
Electrical Engineering, Measurement and Control Technology
,
Physics
Notes:
Abstract We prepared several samples of YBa2Cu3O7−x thick films electrophoretically deposited on metallic substrates, thin films sputtered on dielectric substrates, and bulk pellets, and we tested their microwave properties. Various preparation techniques are described in detail and the importance of appropriate thermal treatment during the fabrication process is emphasized. Experimental results show that electrophoretically deposited thick films on silver substrates reached, after heat treatment, a surface resistance at 50 K of 4×10−2 Ω comparable with the silver value, while the same measurement before sinterization gave a value of 0.5 Ω. Either bulk pellets or thin films gave worse results, though a lack of sensitivity in our experimental apparatus could have influenced our data. The problem of sensitivity in the characterization of microwave properties of small samples is discussed in the appendices.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00617997
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