Published November 1991 | Version v1
Journal article Metadata-only

Growth, microstructure, electrical and magnetic properties of textured materials in the Nd-Ce-Cu-O and Bi-Sr-Ca-Cu-O systems

Creators

  • 1. Paris-11 Univ., 91 - Orsay (France). Lab. de Physique des Solides
  • 2. Thomson-CSF, 91 - Orsay (France)
  • 3. Tokyo Univ. (Japan)

Description

Superconducting textured materials were grown from the melt by a floating zone technique in the Nd-Ce-Cu-O and Bi-Sr-Ca-Cu-O systems. The influence of growth conditions and starting compositions on the microstructures and phase composition of the samples were studied by optical microscopy under polarized light, electron microprobe analysis and X-ray diffraction. The superconducting properties of these samples were examined by both electrical resistivity and magnetic measurements. A very strong influence of the microstructure on the superconducting properties as well as a magnetic and electrical anisotropy were shown. In the case of the Bi-Sr-Ca-Cu-O system, critical current densities ranging from 1 600 to 3 000 A. cm-2 were measured at 77 K. 13 refs.; 5 figs

Abstract (French)

Des materiaux supraconducteurs textures ont ete elabores a partir de l'etat liquide dans les systemes Nd-Ce-Cu-O et Bi-Sr-Ca-Cu-O par une technique de fusion de zone. L'influence des conditions de croissance et des compositions initiales sur la microstructure des echantillons a ete etudiee par microscopie optique en lumiere polarisee, microsonde electronique et diffraction des rayons X. Les proprietes supraconductrices des echantillons ont ete examinees par des mesures electriques et magnetiques. Il a ete observe une forte influence de la microstructure sur les proprietes supraconductrices ainsi qu'une anisotropie electrique et magnetique. Dans le cas du systeme Bi-Sr-Ca-Cu-O, les densites de courant critique mesurees a 77 K sont comprises entre 1 600 et 3 000 A. cm-2

Additional details

Additional titles

Original title (French)
Elaboration, microstructure, proprietes electriques et magnetiques de materiaux textures dans les systemes Nd-Ce-Cu-O et Bi-Sr-Ca-Cu-O

Publishing Information

Journal Title
Journal de Physique 3. Physique Appliquee, Science des Materiaux, Fluides, Plasmas et Instrumentation
Journal Volume
1
Journal Issue
11
Series
J. Phys. 3, Phys. Appl. Sci. Mater. Fluides Plasmas Instrum.
Journal Page Range
1805-1813
ISSN
1155-4320
CODEN
JPAIE

Conference

Title
2. National Workshop Superconducting Ceramics with high critical Temperature.
Original Conference Title
2. Journees Nationales d'etudes Ceramiques Supraconductrices a haute temperature critique
Dates
6-7 Nov 1990.
Place
Caen (France).

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
23030288
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference
Descriptors DEI
BISMUTH OXIDES; CALCIUM OXIDES; CERIUM OXIDES; COPPER OXIDES; ELECTRIC CONDUCTIVITY; HIGH-TC SUPERCONDUCTORS; MAGNETIC FIELDS; MICROSTRUCTURE; NEODYMIUM OXIDES; STRONTIUM OXIDES; ZONE MELTING
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CERIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTAL GROWTH METHODS; CRYSTAL STRUCTURE; ELECTRICAL PROPERTIES; MELTING; NEODYMIUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS