Figure 6

(a,b) Hysteresis loops of BFCT-0.2 at 100 K with both the ZFC and FC processes. For the ZFC/FC process, the sample was cooled in zero/±50 kOe magnetic field from 380 to 100 K, and then the hysteresis loops were measured between ±15 kOe. (c) The field-cooled (FC, in 40 kOe) hysteresis loops for BFCT-0.2 at 100 K with different measuring magnetic fields. (d) The magnified view of the M-H curves in “(c)”.