Interface pinning in high Tc-high Jc Nd1+xBa2-xCu3Oy directionally solidified in air
- 1. Institut de Ciencia de Materials de Barcelona, CSIC, Campus de la UAB, 08193 Bellaterra, Catalunya (Spain)
Description
Single domain bars of NdBa2Cu3O7/Nd4Ba2Cu2O10 (Nd123/422) superconducting composites have been fabricated in air by using a directional solidification technique. Tc values of 96.5 K can be obtained after an Ar heat treatment and further oxygenation thus showing that reduced oxygen partial pressure during solidification is not a fundamental requirement to prepare high-Tc Nd123 bulk superconductors. The temperature dependence of the critical currents point to a limited efficiency of the Nd123/422 interfaces to pin vortices. High resolution electron microscopy observations clearly reveal smooth Nd123/422 interfaces thus suggesting that interface pinning may not be as relevant as compared to Y123/211 composites. copyright 1997 American Institute of Physics
Additional details
Publishing Information
- Journal Title
- Applied Physics Letters
- Journal Volume
- 71
- Journal Issue
- 3
- Journal Page Range
- p. 413-415.
- ISSN
- 0003-6951
- CODEN
- APPLAB
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 28072302
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- BARIUM COMPOUNDS; BARIUM OXIDES; COMPOSITE MATERIALS; COPPER OXIDES; CRITICAL CURRENT; ELECTRON MICROSCOPY; HEAT TREATMENTS; HIGH-TC SUPERCONDUCTORS; INTERFACES; MAGNETIC FLUX; NEODYMIUM COMPOUNDS; NEODYMIUM OXIDES; OXIDATION; SOLIDIFICATION; TRANSITION TEMPERATURE; TRANSMISSION ELECTRON MICROSCOPY
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; CHEMICAL REACTIONS; COPPER COMPOUNDS; CURRENTS; ELECTRIC CURRENTS; MATERIALS; MICROSCOPY; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SUPERCONDUCTORS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS