Nd/Ba substitution and oxygen deficiency effects on the pinning properties of NdBa2Cu3O7-δ single crystals

S. Shibata; K. Nakao; A. Yamamoto; Y. Feng; A. K. Pradhan; T. Machi; N. Koshizuka

Nd/Ba substitution and oxygen deficiency effects on the pinning properties of NdBa₂Cu₃O_7-δ single crystals

S. Shibata, K. Nakao, A. Yamamoto, Y. Feng, A. K. Pradhan, T. Machi, N. Koshizuka

Research output: Contribution to journal › Conference article

Abstract

We studied the origin of peak effect in the magnetic field dependence of Jc in NdBa₂Cu₃O_7-δ single crystals. The single crystals were grown by the slow cooling method under various partial O₂ pressures(PO₂) (0.04∼1%) in Ar atmosphere. We found that the peak effect depends on PO₂ and it disappears for the crystals grown under low PO₂∼0.04%. This result demonstrates the important role of Nd/Ba substitution for the peak effect because it is known that the Nd/Ba substitution decreases with lowering PO₂. We also investigated the role of oxygen vacancies in the peak effect for the crystals with different amount of Nd/Ba substitution. We found that the main cause of peak effect in fully oxygenated crystals is due to local low Tc regions caused by the Nd/Ba substitution rather that those by the oxygen vacancies.

Original language	English
Pages (from-to)	II10.8.1-II10.8.6
Journal	Materials Research Society Symposium - Proceedings
Volume	659
Publication status	Published - 2001 Dec 1
Externally published	Yes
Event	High Temperature Superconductors - Crystal Chemistrym Processing and Properties - Boston, MA, United States Duration: 2000 Nov 27 → 2000 Dec 1

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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Shibata, S., Nakao, K., Yamamoto, A., Feng, Y., Pradhan, A. K., Machi, T., & Koshizuka, N. (2001). Nd/Ba substitution and oxygen deficiency effects on the pinning properties of NdBa₂Cu₃O_7-δ single crystals. Materials Research Society Symposium - Proceedings, 659, II10.8.1-II10.8.6.

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title = "Nd/Ba substitution and oxygen deficiency effects on the pinning properties of NdBa2Cu3O7-δ single crystals",

abstract = "We studied the origin of peak effect in the magnetic field dependence of Jc in NdBa2Cu3O7-δ single crystals. The single crystals were grown by the slow cooling method under various partial O2 pressures(PO2) (0.04∼1%) in Ar atmosphere. We found that the peak effect depends on PO2 and it disappears for the crystals grown under low PO2∼0.04%. This result demonstrates the important role of Nd/Ba substitution for the peak effect because it is known that the Nd/Ba substitution decreases with lowering PO2. We also investigated the role of oxygen vacancies in the peak effect for the crystals with different amount of Nd/Ba substitution. We found that the main cause of peak effect in fully oxygenated crystals is due to local low Tc regions caused by the Nd/Ba substitution rather that those by the oxygen vacancies.",

author = "S. Shibata and K. Nakao and A. Yamamoto and Y. Feng and Pradhan, {A. K.} and T. Machi and N. Koshizuka",

year = "2001",

month = dec,

day = "1",

language = "English",

volume = "659",

pages = "II10.8.1--II10.8.6",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

publisher = "Materials Research Society",

note = "High Temperature Superconductors - Crystal Chemistrym Processing and Properties ; Conference date: 27-11-2000 Through 01-12-2000",

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TY - JOUR

T1 - Nd/Ba substitution and oxygen deficiency effects on the pinning properties of NdBa2Cu3O7-δ single crystals

AU - Shibata, S.

AU - Nakao, K.

AU - Yamamoto, A.

AU - Feng, Y.

AU - Pradhan, A. K.

AU - Machi, T.

AU - Koshizuka, N.

PY - 2001/12/1

Y1 - 2001/12/1

N2 - We studied the origin of peak effect in the magnetic field dependence of Jc in NdBa2Cu3O7-δ single crystals. The single crystals were grown by the slow cooling method under various partial O2 pressures(PO2) (0.04∼1%) in Ar atmosphere. We found that the peak effect depends on PO2 and it disappears for the crystals grown under low PO2∼0.04%. This result demonstrates the important role of Nd/Ba substitution for the peak effect because it is known that the Nd/Ba substitution decreases with lowering PO2. We also investigated the role of oxygen vacancies in the peak effect for the crystals with different amount of Nd/Ba substitution. We found that the main cause of peak effect in fully oxygenated crystals is due to local low Tc regions caused by the Nd/Ba substitution rather that those by the oxygen vacancies.

AB - We studied the origin of peak effect in the magnetic field dependence of Jc in NdBa2Cu3O7-δ single crystals. The single crystals were grown by the slow cooling method under various partial O2 pressures(PO2) (0.04∼1%) in Ar atmosphere. We found that the peak effect depends on PO2 and it disappears for the crystals grown under low PO2∼0.04%. This result demonstrates the important role of Nd/Ba substitution for the peak effect because it is known that the Nd/Ba substitution decreases with lowering PO2. We also investigated the role of oxygen vacancies in the peak effect for the crystals with different amount of Nd/Ba substitution. We found that the main cause of peak effect in fully oxygenated crystals is due to local low Tc regions caused by the Nd/Ba substitution rather that those by the oxygen vacancies.

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M3 - Conference article

AN - SCOPUS:0035743396

VL - 659

SP - II10.8.1-II10.8.6

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

SN - 0272-9172

T2 - High Temperature Superconductors - Crystal Chemistrym Processing and Properties

Y2 - 27 November 2000 through 1 December 2000

ER -