Published January 1, 2005 | Version v1
Journal article Metadata-only

Irreversible field determined by pulsed magnetization and compositional fluctuation of melt-processed (Sm,Eu,Gd)Ba2Cu3O7-δ superconductors

Creators

  • 1. Superconductivity Research Laboratory, ISTEC, 1-10-13 Shinonome, Koto-ku, Tokyo 105-0023 (Japan)
  • 2. Superconductivity Research Laboratory, ISTEC, Morioka Laboratory for Applied Superconductivity Technology, 3-35-2 Iioka-Shinden, Morioka, Iwate 020-0852 (Japan)
  • 3. School of Mechanical, Manufacture and Medical Engineering, Queensland University of Technology, GPO Box 2434, Brisbane, QLD 400 (Australia)

Description

Irreversible fields Birr of melt-processed (Sm,Eu,Gd)Ba2Cu3O7-δ bulk superconductors with varying (Sm,Eu,Gd)2BaCuO5 concentrations have been measured with pulsed magnetic fields up to 28 T in a temperature range from 55 to 85 K. The temperature dependence of Birr was studied by taking account of the effect of heat generation. In comparison with that including 5 mol% (Sm,Eu,Gd)2BaCuO5 phase the samples with 40 mol% (Sm,Eu,Gd)2BaCuO5 inclusion displayed a lower Birr value for temperatures above 75 K, while Birr was enhanced below 75 K. TEM observation unveiled a sharp contrast between a uniform nano-scaled compositional modulation in compositions with 40% (Sm,Eu,Gd)2BaCuO5 inclusion and an inhomogeneous distribution with very low (Sm,Eu,Gd)2BaCuO5 concentration. The present result could thus be understood in the context of different defect states induced by locally compositional fluctuation

Availability note (English)

Available online at http://stacks.iop.org/0953-2048/18/58/sust5_1_010.pdf or at the Web site for the journal Superconductor Science and Technology (ISSN 1361-6668) http://www.iop.org/

Additional details

Identifiers

URL
http://stacks.iop.org/0953-2048/18/58/sust5_1_010.pdf; http://www.iop.org/;
DOI
10.1088/0953-2048/18/1/010;
PII
S0953-2048(05)76127-3;

Publishing Information

Journal Title
Superconductor Science and Technology
Journal Volume
18
Journal Issue
1
Journal Page Range
p. 58-63
ISSN
0953-2048
CODEN
SUSTEF

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
36039626
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
BARIUM COMPOUNDS; COMPARATIVE EVALUATIONS; CUPRATES; DISTRIBUTION; EUROPIUM COMPOUNDS; FLUCTUATIONS; GADOLINIUM COMPOUNDS; HEAT; HIGH-TC SUPERCONDUCTORS; INCLUSIONS; MAGNETIC FIELDS; MAGNETIZATION; MODULATION; SAMARIUM COMPOUNDS; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0013-0065 K; TEMPERATURE RANGE 0065-0273 K; TRANSMISSION ELECTRON MICROSCOPY
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; COPPER COMPOUNDS; ELECTRON MICROSCOPY; ENERGY; EVALUATION; MICROSCOPY; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS; SUPERCONDUCTORS; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS; TYPE-II SUPERCONDUCTORS; VARIATIONS