Anomalous magnetization peak effect in Bi2Sr2CaCu2O8 single crystals

作者：Wang WH^*; Li SL; Chen ZJ; Wen HH; Xiong YF

来源：Acta Physica Sinica, 2001, 50(12): 2466-2470.

• Bi2Sr2CaCu2O8 single crystals
• magnetic hgsteresis loop
• peak effect
• phase diagram

Magnetic hysteresis loops were measured on Bi2Sr2CaCu2O8 single crystals with a vibrating sample magnetometer. An anomalous second magnetization peak was observed between 20 and 40K. The magnetic fields showing peak effect in over - doped crystal were observed to be higher than the optimally doped samples. The disorder - driven transition shifted to lower fields with increasing point disorder. At lower temperatures the quasilattice transformed into a disordered solid as the field was increased above the second magnetization peak. There was not any transition from the ordered solid quasilattice to a disordered solid below 20K in schematic vortex matter phase diagram in BSCCO. The peak effect was a complicated function of magnetic field, temperature and material disorder.

• 出版日期2001-12
• 单位中国科学院