Superconducting cuprates with the general stoichiometry (Tl, Hg) 2 (Ba, Sr) (Sr, Ca) 1 Cu 2 O 8؊ were examined by X-ray powder di4raction, including Rietveld re5nement calculations. The aim was to obtain structural properties that could be related to the diamagnetic transition onset temperature (T c
Dependence of characteristic properties of Hg–Ba–Ca–Cu–O superconductors on the preparation process
✍ Scribed by I. Kirschner; R. Laiho; E. Lähderanta; P. Lukács; M. Dimitrova-Lukács
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 186 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0749-6036
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✦ Synopsis
Different methods of deviating efficiency exist for preparation of Hg-Ba-Ca-Cu-O high-T c superconductors. They may be divided into such fundamental groups, which lead to different kinds of Hg-based compounds having unlike macroscopic and microscopic characteristic features. This paper analyses the relationship between some efficient preparation procedures and superconducting properties of different compounds resulting from them. Not only are the effects of practical methods, which produce high-quality single-phase or nearly singlephase materials of the homologous series Hg 1 Ba 2 Ca n-1 Cu n O 2n+2+δ investigated but the deviations from them and their influence on the developing characteristics of samples are also evaluated.
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