The effect of electron irradiation on the critical temperature and magnetoresistance of multiple-strand Ag/Bi2223 tapes

被引：0
作者：
Kolokoltsev V.N. [1 ]
Mikhailov B.P. [1 ]
Borovitskaya I.V. [1 ]
Ivanov L.I. [1 ]
Sadykhov S.I. [1 ]
Nikulin V.Ya. [2 ]
机构：
[1] Baikov Institute of Metallurgy, Russian Academy of Sciences, Moscow 117334
[2] Lebedev Physical Institute, Russian Academy of Sciences, Moscow 119991
来源：
Inorganic Materials: Applied Research | 1600年 / Maik Nauka Publishing / Springer SBM卷 / 04期
关键词：
critical temperature; electron irradiation; high-temperature superconductor; magnetoresistance;
D O I：
10.1134/S2075113313020068
中图分类号：
学科分类号：
摘要：
The effect of 2 MeV electron irradiation at 300 K on the critical temperature (T c ) and magnetoresistance (R B) at T < T c of Ag/Bi2223 tapes is investigated. It is shown that a slight increase in T c and abnormal reduction of R B are observed at low irradiation doses (∼1014 cm-2). At higher doses (∼1015 cm-2) or longer storage of irradiated specimens at 300 K, a decrease in T c and an increase in R B are observed. Variations in the critical parameters of tapes upon electron irradiation are controlled by a spatial grid of tunnel Josephson transitions at intercrystallite boundaries. It is assumed that an increase in R B is caused by accumulation of defects at the intercrystallite boundaries. The revealed anomalous decrease in R B is related to pinning of the magnetic flux at radiation-induced defects in Bi2223 microcrystals. © 2013 Pleiades Publishing, Ltd.
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页码：155 / 159
页数：4
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