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  • 1
    Electronic Resource
    Electronic Resource
    Suppression of superconductivity in the Er1− x Pr x Ba2Cu3O7−δ (1993)
    Springer
    Journal of materials science 28 (1993), S. 6545-6548 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Measurements of electrical resistivity. X-ray diffraction patterns, magnetic susceptibility and thermoelectric power of the Er1-x Pr x Ba2Cu3O7-δ system have been made. The superconducting transition temperature was found to decrease monotonically with praseodymium concentration, x. From the susceptibility data, it was determined that the valence of praseodymium lies between +3 and +4. The thermoelectric power was found to increase with x, and the slopes of dS/dT were negative except for the case x= 0. The. tendency of the thermopower to change with increasing praseodymium concentration has been qualitatively explained using the theory for strongly correlated systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00356391
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Superconductivity of (Y1−xREx)Ba2Cu3O7#x2212;δ system (1990)
    Springer
    Journal of materials science 25 (1990), S. 1762-1764 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Polycrystalline samples of the superconducting oxides (Y1−x RE x )Ba2Cu3O7−δ (RE = Er and Dy) withx=0, 0.2, 0.4, 0.6, 0.8 and 1.0 were prepared. From the X-ray diffraction and the electrical resistivity measurements, it was found thatT c and the unit cell volume have common peaks nearx≃0.4. Close examination of previously published data on the (Y1−xRE x )Ba2Cu3O7−δ system also indicate that an anomaly exists nearx−0.4. This anomaly is ascribed to an anomalous change ofδ in oxygen nearx≃0.4.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01045381
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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