TY - JOUR
T1 - Field induced flux pinning in Nd1+xBa2-xCu3O7-δ single crystal
AU - Mochida, T.
AU - Murakami, M.
N1 - Funding Information:
This work was partially supported by NEDO. The authors thank Mr. K. Sawada for preparing the sample. We thank both Dr. M.R. Koblishka and Dr. A.J.J. van Dalen for useful advice concerning SQUID measurements. We are grateful to Dr. N. Chikumoto, Dr. M. Wahahiki, Mr. T. Higuchi and Dr. A. Anderson for helpful suggestions. Acknowledgment is also due to Dr. S.I. Yoo and Mr. N. Sakai for continuous encouragement.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 1997/11/1
Y1 - 1997/11/1
N2 - The flux pinning behavior of a Nd1 + xBa2 - xCu3O7 - δ (Nd123) single crystal, which exhibited a peak effect, has been studied by monitoring the time decay of the magnetic moment. The apparent pinning energy (U0*) was deduced from flux creep data on the basis of the Anderson-Kim model. The magnetic field dependence of U0* showed maxima at peak fields which depended on the temperatures, in a similar manner to those of critical current densities. In addition, the temperature dependence of U0* showed several features. To explain the increase in U0* with the field as well as its temperature and field dependence, we made a numerical calculation by introducing an additional pinning energy which increased with increasing field. The results are in good agreement with the experimental data, especially at temperatures above 60 K, where the contribution of field induced pinning centers is believed to be dominant.
AB - The flux pinning behavior of a Nd1 + xBa2 - xCu3O7 - δ (Nd123) single crystal, which exhibited a peak effect, has been studied by monitoring the time decay of the magnetic moment. The apparent pinning energy (U0*) was deduced from flux creep data on the basis of the Anderson-Kim model. The magnetic field dependence of U0* showed maxima at peak fields which depended on the temperatures, in a similar manner to those of critical current densities. In addition, the temperature dependence of U0* showed several features. To explain the increase in U0* with the field as well as its temperature and field dependence, we made a numerical calculation by introducing an additional pinning energy which increased with increasing field. The results are in good agreement with the experimental data, especially at temperatures above 60 K, where the contribution of field induced pinning centers is believed to be dominant.
KW - Fishtail effect
KW - Flux creep
KW - Flux pinning
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U2 - 10.1016/S0921-4534(97)01706-1
DO - 10.1016/S0921-4534(97)01706-1
M3 - Article
AN - SCOPUS:0031276512
SN - 0921-4534
VL - 290
SP - 311
EP - 316
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 3-4
ER -