TY - JOUR
T1 - Nd/Ba substitution and oxygen deficiency effects on the pinning properties of Nd1+xBa2-xCu3O7-δ single crystals
AU - Shibata, S.
AU - Yamamoto, A.
AU - Feng, Y.
AU - Pradhan, A. K.
AU - Machi, T.
AU - Koshizuka, N.
N1 - Funding Information:
This work was supported by New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications.
Copyright:
Copyright 2005 Elsevier B.V., All rights reserved.
PY - 2001/8
Y1 - 2001/8
N2 - The origin of the peak effect on Jc is studied for Nd1+xBa2-xCu3O7-δ single crystals grown by the slow cooling method under various partial O2 pressures, PO2 = 0.04 ∼ 1% in Ar atmosphere. We find that the peak effect disappears for the crystals grown under PO2 ∼ 0.04%, where the Nd/Ba substitution can be negligible. This result demonstrates the important role of Nd/Ba substitution for the peak effect. We also investigate the oxygen vacancy effect on the peak effect by using oxygen deficient samples. The large peak effect at relatively high fields seems to be brought by controlling the amount of Nd/Ba substitution rather than oxygen vacancies in almost fully oxygenated crystals.
AB - The origin of the peak effect on Jc is studied for Nd1+xBa2-xCu3O7-δ single crystals grown by the slow cooling method under various partial O2 pressures, PO2 = 0.04 ∼ 1% in Ar atmosphere. We find that the peak effect disappears for the crystals grown under PO2 ∼ 0.04%, where the Nd/Ba substitution can be negligible. This result demonstrates the important role of Nd/Ba substitution for the peak effect. We also investigate the oxygen vacancy effect on the peak effect by using oxygen deficient samples. The large peak effect at relatively high fields seems to be brought by controlling the amount of Nd/Ba substitution rather than oxygen vacancies in almost fully oxygenated crystals.
KW - Nd/Ba substitution
KW - NdBaCuO single crystals
KW - Oxygen vacancy effect
KW - Peak effect
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U2 - 10.1016/S0921-4534(01)00341-0
DO - 10.1016/S0921-4534(01)00341-0
M3 - Article
AN - SCOPUS:0035425090
SN - 0921-4534
VL - 357-360
SP - 523
EP - 526
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - SUPPL. 2
ER -