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

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 (∼10 14 cm −2 ). At high...

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Bibliographic Details
Published in:Inorganic materials : applied research 2013-03, Vol.4 (2), p.155-159
Main Authors: Kolokoltsev, V. N., Mikhailov, B. P., Borovitskaya, I. V., Ivanov, L. I., Sadykhov, S. I., Nikulin, V. Ya
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials for General Purpose
Materials Science
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Summary: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 (∼10 14 cm −2 ). At higher doses (∼10 15 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.
ISSN:2075-1133
2075-115X
DOI:10.1134/S2075113313020068