Published April 1, 1989
| Version v1
Journal article
Eight new high-temperature superconductors with the 1:2:4 structure
Creators
- 1. Physics Division, Lawrence Berkeley Laboratory, Berkeley, California 94720
Description
New high-temperature superconducting compounds RBa2Cu4O8 (R = Nd, Sm, Eu, Gd, Dy, Ho, Er, and Tm) which share the 1:2:4 structure of YBa2Cu4O8 are bulk synthesized using a new high-pressure oxygen technique. All compounds show substantial Meissner diamagnetism [(3--25) x 10/sup -4/ emu/g at 20 K]. Critical temperatures (57--81 K) vary inversely with ion size (opposite to 1:2:3), and directly with orthorhombic distortion (which is much smaller than in corresponding 1:2:3 compounds). R2Ba4Cu7O/sub x/ compounds (with alternating blocks of 1:2:3: and 1:2:4) were also prepared. The variable oxygen stoichiometry of 1:2:3 is not shared by the 1:2:4 compounds
Additional details
Publishing Information
- Journal Title
- Physical Review, B: Condensed Matter
- Journal Volume
- 39
- Journal Issue
- 10
- Series
- Phys. Rev., B: Condens. Matter.
- Journal Page Range
- 7347-7350
- ISSN
- 0163-1829
- CODEN
- PRBMD
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 20048350
- Subject category
- S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- BARIUM OXIDES; COPPER OXIDES; CRYSTAL STRUCTURE; DYSPROSIUM OXIDES; ERBIUM OXIDES; EUROPIUM OXIDES; GADOLINIUM OXIDES; HOLMIUM OXIDES; MEISSNER-OCHSENFELD EFFECT; NEODYMIUM OXIDES; SAMARIUM OXIDES; SUPERCONDUCTIVITY; THULIUM OXIDES; TRANSITION TEMPERATURE; X-RAY DIFFRACTION
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; COPPER COMPOUNDS; DIFFRACTION; DYSPROSIUM COMPOUNDS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ERBIUM COMPOUNDS; EUROPIUM COMPOUNDS; GADOLINIUM COMPOUNDS; HOLMIUM COMPOUNDS; NEODYMIUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SAMARIUM COMPOUNDS; SCATTERING; THERMODYNAMIC PROPERTIES; THULIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS