TY - JOUR
T1 - Flux pinning property in a single crystal NdBa2Cu 3Oy superconductor
AU - Hasan, M. N.
AU - Kurokawa, T.
AU - Kiuchi, M.
AU - Otabe, E. S.
AU - Matsushita, T.
AU - Chikumoto, N.
AU - MacHi, T.
AU - Muralidhar, M.
AU - Murakami, M.
PY - 2005/10/1
Y1 - 2005/10/1
N2 - The critical current density Jc and the apparent pinning potential U0 * in a single crystal NdBa2Cu 3Oy superconductor which shows a broad peak effect are investigated by measuring a DC magnetization and its relaxation. The field-induced pinning mechanism does not explain the temperature dependence of peak field Bp and dip field Bd. The experimental results of Jc and U0* are compared with the theoretical analysis based on the flux creep-flow model, taking the distribution of the flux pinning strength into account. The number of flux lines in the flux bundle (g2), the most probable value of pinning strength (Am) and distribution width (σ2) are determined so that a good fit is obtained between the experimental and theoretical results. The behavior of these parameters is discussed in correspondence to the disorder transition of flux lines.
AB - The critical current density Jc and the apparent pinning potential U0 * in a single crystal NdBa2Cu 3Oy superconductor which shows a broad peak effect are investigated by measuring a DC magnetization and its relaxation. The field-induced pinning mechanism does not explain the temperature dependence of peak field Bp and dip field Bd. The experimental results of Jc and U0* are compared with the theoretical analysis based on the flux creep-flow model, taking the distribution of the flux pinning strength into account. The number of flux lines in the flux bundle (g2), the most probable value of pinning strength (Am) and distribution width (σ2) are determined so that a good fit is obtained between the experimental and theoretical results. The behavior of these parameters is discussed in correspondence to the disorder transition of flux lines.
KW - Disorder transition of flux lines
KW - Field-induced pinning
KW - Flux creep-flow model
KW - NdBaCuO superconductor
KW - Peak effect
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U2 - 10.1016/j.physc.2005.01.024
DO - 10.1016/j.physc.2005.01.024
M3 - Conference article
AN - SCOPUS:25644453507
VL - 426-431
SP - 295
EP - 299
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - I
T2 - Proceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity
Y2 - 23 November 2004 through 25 November 2004
ER -