Abstract:
Non linear, field modulated, direct microwave absorption (MA) was studied in the high-Tc copper-free isotropic Ba1-xKxBiO3 (BaKBiO) powder samples. The microwave determined critical magnetic field gradient and the corresponding depinning current density were compared with the values obtained previously for YBaCuO (YBCO) and BiSrCaCuO (BSCCO). © 1994.