TY - JOUR
T1 - Influence of bending strain on Bi-2223 tape
AU - Nishimura, S.
AU - Kiss, T.
AU - Inoue, M.
AU - Ishimaru, M.
AU - Kiuchi, M.
AU - Takeo, M.
AU - Okamoto, H.
AU - Matsushita, T.
AU - Ito, K.
N1 - Funding Information:
This work was partly supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2002/8
Y1 - 2002/8
N2 - The behavior of current-voltage (I-V) characteristics in Bi-2223 AgAgMg sheathed tape at various bending strain has been studied. The measured results were analyzed using the percolation model, and then the variation of critical current density, Jc, has been analyzed. As increasing of bending strain, Jc in the tape is reduced irreversible way. The irreversible degradation indicates that the Jc reduction is caused mainly by crack formation. However, if we extract statistic Jc distribution taking into account the cracking, it can be seen that the value of local Jc is enlarged in the remained region as the strain is increased. Namely, the pinning strength in the remained region is enlarged as the bending strain is increased. Present analysis allows us to separate the influence on grain connectivity and pinning strength originated from the strain.
AB - The behavior of current-voltage (I-V) characteristics in Bi-2223 AgAgMg sheathed tape at various bending strain has been studied. The measured results were analyzed using the percolation model, and then the variation of critical current density, Jc, has been analyzed. As increasing of bending strain, Jc in the tape is reduced irreversible way. The irreversible degradation indicates that the Jc reduction is caused mainly by crack formation. However, if we extract statistic Jc distribution taking into account the cracking, it can be seen that the value of local Jc is enlarged in the remained region as the strain is increased. Namely, the pinning strength in the remained region is enlarged as the bending strain is increased. Present analysis allows us to separate the influence on grain connectivity and pinning strength originated from the strain.
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U2 - 10.1016/S0921-4534(02)00956-5
DO - 10.1016/S0921-4534(02)00956-5
M3 - Article
AN - SCOPUS:0036683614
SN - 0921-4534
VL - 372-376
SP - 1001
EP - 1004
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - PART 2
ER -