Published November 1995
| Version v1
Journal article
Orthorhombic to tetragonal transition and appearance of superconductivity in Nd0.7Pr0.3Ba2-kSrkCu3O6+z (0≤k≤1)
Creators
- 1. CNRS, Meudon (France). Lab. de Physique des Solides de Bellevue
- 2. Univ. de Paris Sud, Orsay (France). Lab. de Chimie des Solides
Description
Preparation, X-ray diffraction and ac susceptibility of Nd0.7Pr0.3Ba2-kSrkCu3O6+z (0 ≤ k ≤ 1) are reported. An orthorhombic to tetragonal transition was observed for k ≥ 0.75. Superconductivity occurred only for k≥0.25. When the samples were heated in argon prior to oxygen annealing both the orthorhombicity (for 0 ≤ k ≤ 0.75) and Tc increased (by 10 K for k = 1). Though a weakening of Pr-f hybridization with Cu-O bands due to Sr substitution may explain the data, a detailed knowledge of oxygen defect chemistry will be required to understand the behavior of Pr in LnBa2Cu3O6+z (Ln = rare earths)
Additional details
Publishing Information
- Journal Title
- Materials Research Bulletin
- Journal Volume
- 30
- Journal Issue
- 11
- Journal Page Range
- p. 1363-1370.
- ISSN
- 0025-5408
- CODEN
- MRBUAC
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 27013467
- Subject category
- S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- BARIUM OXIDES; COPPER OXIDES; CRYSTAL-PHASE TRANSFORMATIONS; EXPERIMENTAL DATA; MAGNETIC SUSCEPTIBILITY; NEODYMIUM OXIDES; PRASEODYMIUM OXIDES; STRONTIUM OXIDES; SUPERCONDUCTIVITY; TRANSITION TEMPERATURE
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; DATA; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; INFORMATION; MAGNETIC PROPERTIES; NEODYMIUM COMPOUNDS; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; PHYSICAL PROPERTIES; PRASEODYMIUM COMPOUNDS; RARE EARTH COMPOUNDS; STRONTIUM COMPOUNDS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS