Vi. Gatalskaya et al., STUDY OF MAGNETIC IRREVERSIBILITY LINE OF BAKBIO SINGLE-CRYSTALS NEART-C, Czechoslovak journal of Physics, 46, 1996, pp. 845-846
We have first found and studied the fishtail features in BaKBiO single
crystals observed in the whole temperature range (4.2K - T-c), The na
ture of irreversibility line is discussed in terms of flux creep model
.