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  • 1
    Electronic Resource
    Electronic Resource
    On the limiting factors of the critical current density in high-T c superconducting ceramics (1990)
    Springer
    Journal of superconductivity 3 (1990), S. 391-394 
    Details
    ISSN: 1572-9605
    Keywords: High-T c superconducting ceramics ; critical current density ; Josephson vortices ; pinning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The temperature dependence of the critical current density at high temperatures and in weak applied magnetic field for YBa2Cu3O7−y ceramic samples with a pronounced granular character is analyzed. The experimental results can be explained in terms of thermally activated motion of the intergrain Josephson vortices at grain boundaries, which may be an indication that the actual limiting factor for the critical current density in ceramic samples results from a weak pinning force density for the intergrain vortices rather than from the weak-link quenching.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00617464
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Nonmonotonous Variation of the Superconducting Parameters of Neutron Irradiated Li-Doped YBa2Cu3O7−x (1998)
    Springer
    Journal of superconductivity 11 (1998), S. 245-251 
    Details
    ISSN: 1572-9605
    Keywords: YBa2Cu3O7−x ; Li-doped superconductors ; critical temperature ; critical current density ; neutron irradiation ; Van Hove singularity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The effect of thermal and epithermal neutron irradiation on the superconducting critical temperature and critical current density of some Li-doped YBa2Cu3O7−x samples was studied. The critical temperature exhibits a peak and the critical current density a valley in their dependence on neutron fluence, for moderate dose. A simple model, based on the Van Hove scenario and the kinetics of the defect production, is used to describe both phenomena.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022627800159
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Fish-Tail Effect and Its Evolution Under Neutron Irradiation in Li-Doped YBa2Cu3O7−x (2000)
    Springer
    Journal of superconductivity 13 (2000), S. 519-528 
    Details
    ISSN: 1572-9605
    Keywords: fish-tail effect ; neutron irradiation ; critical current density ; Lindemann number
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The evolution of the critical current density of Li-doped YBa2Cu3O7−x polycrystalline samples submitted to neutron irradiation is investigated as function of magnetic field (0 ≤ B ≤ 6 T) temperature (5 ≤ T ≤ 85 K) and neutron fluence (0 ≤ Φ ≤ 9.98 × 1017 cm−2). At fluences lower than 1017 cm−2, a second peak in j s vs. B dependence is present (fish-tail effect). Its magnitude decreases with increasing the fluence. Above 1017 cm−2, the second peak of current density completely disappears; instead, the logarithmic susceptibility shows a second peak at a certain field B infl. A dependence of B infl on fluence is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007860431003
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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