Thermally Activated Flux Motion in 2223 Phase High Temperature Superconductors
CHEN Jun, LI Gang, LI Chuanyi, FENG Qingrong, ZHANG Han, FENG Xiaoqi, ZHU Xing, YIN Daole
Department of Physics, Peking University, Beijing 100871
Thermally Activated Flux Motion in 2223 Phase High Temperature Superconductors
CHEN Jun;LI Gang;LI Chuanyi;FENG Qingrong;ZHANG Han;FENG Xiaoqi;ZHU Xing;YIN Daole
Department of Physics, Peking University, Beijing 100871
关键词 ：
74.60.Ec ,
74.60.Ge
Abstract ： Isothermal V-I characteristics of Bi1.8 Pb0.2 Sr2 Ca2 Cu3 Oy high temperature superconductors (HTSCs) have been systematically studied. Below the irre-versibility temperature Tr (H), two important features were observed: 1) Both positive and negative curvatures can coexist in the same isothermal V-I curve, so it is different from the scaling behavior V∝exp(-(J0 /J)μ ). 2) The activa-ion volume of flux motion is found temperature dependent as (1=T/Tr (H))-2v with v about 0.5. This behavior supports the existence of a two-dimensional secondary phase transition below Hc2 (T) in this Bi-based HTSCs.
Key words ：
74.60.Ec
74.60.Ge
出版日期: 1992-04-01
引用本文:
CHEN Jun;LI Gang;LI Chuanyi;FENG Qingrong;ZHANG Han;FENG Xiaoqi;ZHU Xing;YIN Daole
. Thermally Activated Flux Motion in 2223 Phase High Temperature Superconductors[J]. 中国物理快报, 1992, 9(4): 206-208.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y1992/V9/I4/206
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