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  • superconductivity  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Oxygen Configuration in the Superconductor (Hg0.7Mo0.3)Sr2(Ca1−xRx)Cu2Oz (R = Nd and Pr) (2000)
    Springer
    Journal of superconductivity 13 (2000), S. 111-119 
    Details
    ISSN: 1572-9605
    Keywords: superconductivity ; Hg-based cuprate ; Hg-1212 (Hg,Mo)Sr2(Ca,R)Cu2O z ; neutron diffraction ; crystal structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Two series of Hg-based oxides (Hg0.7Mo0.3)Sr2(Ca1−x R x )Cu2O z (R = Nd and Pr, 0.2 ≤ x ≤ 0.7) have been synthesized. Electrical-resistivity measurements show that these compounds are superconductors with maximum onset T c of 107 and 102 K for Nd- and Pr-containing samples, respectively. The neutron powder diffraction experiments on both as-prepared and O2-annealed samples of R = Nd revealed that the O(3) site at the HgOδ sheets are fully occupied and shifted towards the Hg/Mo site to form Mo–O bonds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007738528912
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis, Structure, and Superconductivity of (La1.5Pb0.5−xSrx)CuOz (2000)
    Springer
    Journal of superconductivity 13 (2000), S. 121-128 
    Details
    ISSN: 1572-9605
    Keywords: superconductivity ; crystal structure ; magnetization ; 214
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The substitution of strontium for lead in the material (La1.5Pb0.5−x Sr x )CuO z , x = 0–0.15 has been carried out. A stable and reproducible single phased superconducting materials can be obtained inside an evacuated quartz tube. The X-ray diffraction pattern shows that the superconducting phase can be indexed on the basis of an orthorhombic symmetry (F mmm) for x = 0 and on the basis of tetragonal symmetry (I 4/mmm) for x 〉 0. The transition temperature T c increases as the strontium substitution parameter x increases. We observed the maximal T c around x = 0.15 with 38 K with fairly large Meissner volume fraction of 38% (FC).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007790512982
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