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

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

Research output: Contribution to journalArticle

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.

Original languageEnglish
JournalMaterials Research Society Symposium - Proceedings
Volume659
Publication statusPublished - 2001
Externally publishedYes

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hypoxia
Substitution reactions
Single crystals
Partial pressure
substitutes
Oxygen
single crystals
partial pressure
Oxygen vacancies
Crystals
crystals
oxygen
Magnetic fields
Cooling
cooling
atmospheres
causes
magnetic fields

ASJC Scopus subject areas

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

Cite this

Nd/Ba substitution and oxygen deficiency effects on the pinning properties of NdBa2Cu3O7-δ single crystals. / Shibata, S.; Nakao, K.; Yamamoto, Ayako; Feng, Y.; Pradhan, A. K.; Machi, T.; Koshizuka, N.

In: Materials Research Society Symposium - Proceedings, Vol. 659, 2001.

Research output: Contribution to journalArticle

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AU - Shibata, S.

AU - Nakao, K.

AU - Yamamoto, Ayako

AU - Feng, Y.

AU - Pradhan, A. K.

AU - Machi, T.

AU - Koshizuka, N.

PY - 2001

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