Open AccessTHE EFFECTIVE FLUX PINNING FORCE OF SUPERCONDUCTING CERAMIC YBaCuO
Author(s) -
Ding Shiying,
Yan Jia-Lie,
Yu Zheng,
Tong Hong-Wu,
Shi Ke-Xing,
Qiu Li
Publication year - 1990
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.39.157
Subject(s) - flux pinning , pinning force , condensed matter physics , superconductivity , magnetization , materials science , ceramic , magnetic flux , lattice (music) , hysteresis , zener pinning , magnetic hysteresis , magnetic field , flux (metallurgy) , high temperature superconductivity , critical current , physics , composite material , quantum mechanics , acoustics , metallurgy
Based on the concept of effective flux pinning force proposed by the present authors, a method desoribing hysteresis of superconducting ceramic samples with great number of interfaces has been established. The dependences of residual magnetization on magnetizing field and temperature were measured and the effective flux pinning force was extracted from the magnetizations according to the method mentioned above. The force consisted of two types, one of which results from interface magnetic currents which conduct the force to crystal lattice directly, and governed by weak links if there are. The other arises from the flux pinning of intragrain pinning centres. The former is important in small fields whereas the later is dominant in high fields.