The authors report on magnetic measurements with a SQUID-magnetometer where the tilt angle between the direction of the c-axis and the magnetic field was varied from 0 degrees (B//c) to 90 degrees (B perpendicular to c). The hysteresis loop was recorded in the range of 0 T to 5.5 T at 77 K. Intense flux creep measurements were performed between 0.03 T and 2 T at 77 K. The increase of the magnetic critical current and the change of flux creep were examined after fast neutron irradiation with different doses.
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Fischer et al. (1992) studied this question.
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