Open AccessFlux jumps in textured (Nd0.33Eu0.33Gd0.33)Ba2Cu3O7－δ superconductor with high content Gd-211 phase
Author(s) -
Chi Chang-Yun,
Jincang Zhang,
Lingwei Li,
Fen Liu,
Wenfeng Li,
Chao Jing,
Shixun Cao,
M. Muralidhar,
Xin Yao
Publication year - 2005
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.54.2307
Subject(s) - flux (metallurgy) , condensed matter physics , superconductivity , flux pinning , materials science , anisotropy , instability , magnetic flux , phase (matter) , atmospheric temperature range , creep , magnetic field , high temperature superconductivity , thermodynamics , physics , mechanics , composite material , optics , metallurgy , quantum mechanics
Flux jumps behavior in textured (Nd0.33Eu0.33Gd0.33)Ba2Cu3O7-δ with high content of Gd-21 1 phase have been studied. With the magnetic field parallel to the c axis, partial flux jumps have been obser ved in the temperature range 2—3K, and there were no jumps found above 5K. When ab plane is parallel to the field direction, no flux jumps have been observ ed in the whole temperature range (from 2K to Tc). The anisotropi c flux instability may be due to the anisotropic pinning force and geometrical demagnet ization factor. As the temperature increases,the number of flux jumps is decreas ed, and the third quadrant of M(H) curve is the most flux instability quadra nt. Finally we have studied the magnetic field sweep rate dependence of flux jum p, and discussed the influence of flux creep on flux jump.