ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
By controlling pulse number of laser ablation, we prepared a series of quasi-multilayers ofYBa2Cu3O7-δ/M (M=incomplete oxide layer) namely 70×(40/n) (n = 2, 5, 10 and 20, pulse number ofM) which were characterised with nano-scale precipitates. While the texture properties of Y123inside qusi-multilayer hardly change, its Tc appeared much different depending on the doping level ofM. X-ray θ-2θ scanning and pole figures indicated that the different growth-controlled precipitatesoccured inside Y123 films. In the case of M=YSZ (Yttria Stabilized Zirconia), nanosized perovskiteprecipitates of BaZrO3 formed as a result of solid state reaction of YSZ with Y123, leading to Tcobviously decreasing with increasing of n. In the case of M=Y2O3, however, Tc did not decrease somuch at the studied range of n due to no solid state reaction mentioned above. Magneto-transport andfield angular dependence showed that the critical current density in films with lower doping content(such as n = 2) was improved in large ranges of field and temperature, suggesting tailorableenhancement and anisotropy of flux pinning force
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.1865.pdf
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