Pinning behaviour in high temperature superconductors
One of the obstacles of the application of high temperature superconductors (HTS) in high current
applications is the weak pinning in this type of materials. The reason for this behaviour is mainly the small coherence
length and the high anisotropy of HTS. A consequence of the weak pinning is the appearance of large flux creep effects.
Investigation of the flux creep by magnetic relaxation measurements are going in two directions:
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High temperature superconductors
Fig.2: Comparison of mean effective activation energy for the different classes of high temperature superconductors: YBCO, BSCCO (2223, 2212), Tl2223, LSCO and NCCO. Inset: Temperature of the maximum in the normalized creep rate measured in Ba = Bmin |
Contact: M. Reissner |