Open AccessANOMALOUS MAGNETIZATION PEAK EFFECT IN Bi2Sr2CaCu2O8 SINGLE CRYSTALS
Author(s) -
Wang Wen-Hu,
Shiliang Li,
Zhaojia Chen,
Hao Wen,
Xiong Yu-Feng
Publication year - 2001
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.50.2466
Subject(s) - condensed matter physics , magnetization , magnetometer , materials science , magnetic field , hysteresis , phase diagram , vortex , single crystal , crystal (programming language) , nuclear magnetic resonance , phase (matter) , physics , thermodynamics , quantum mechanics , computer science , programming language
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.