Structural phase transformation in the superconducting YLa/sub x/Ba/sub 2/. sqrt. /sub x/Cu/sub 3/O/sub 7/ compounds
Journal Article
·
· Appl. Phys. Lett.; (United States)
An orthorhombic-to-tetragonal phase transformation in YLa/sub x/Ba/sub 2/..sqrt../sub x/Cu/sub 3/O/sub 7/ has been observed as a function of x, but with the same oxygen concentration, from x-ray powder diffraction data. Compounds with xless than or equal to0.37 have T/sub c/ in the 93--53 K range and are orthorhombic, while compounds with xgreater than or equal to0.45 have T/sub c/less than or equal to42 K and are tetragonal. An analysis of the YLa/sub 0.6/Ba/sub 1.4/Cu/sub 3/O/sub 6.99/ diffraction pattern suggests that the tetragonal structure is closely related to those of the orthorhombic YBa/sub 2/Cu/sub 3/O/sub 7/ and the tetragonal YBa/sub 2/Cu/sub 3/O/sub 6/ with a partial substitution of La/sup 3 +/ ion on the Ba/sup 2 +/ site and a disorder of oxygen atoms at the midpoints of both a and b unit cell edges.
- Research Organization:
- IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099
- OSTI ID:
- 5221463
- Journal Information:
- Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 52:22; ISSN APPLA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effect of Ga addition to YBa/sub 2/Cu/sub 3/O/sub 7/
Orthorhombic-to-tetragonal transition in R/sub 1+//sub x/Ba/sub 2-//sub x/Cu/sub 3/O/sub 7+//sub delta/ (R = Nd, Sm, and Eu)
Structure-property relationships for RBa/sub 2/Cu/sub 3//O/sub x/ phases. [R = Y, La, Nd, Er]
Journal Article
·
Sat Oct 01 00:00:00 EDT 1988
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:7063172
Orthorhombic-to-tetragonal transition in R/sub 1+//sub x/Ba/sub 2-//sub x/Cu/sub 3/O/sub 7+//sub delta/ (R = Nd, Sm, and Eu)
Journal Article
·
Mon Aug 01 00:00:00 EDT 1988
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6979838
Structure-property relationships for RBa/sub 2/Cu/sub 3//O/sub x/ phases. [R = Y, La, Nd, Er]
Conference
·
Wed Dec 31 23:00:00 EST 1986
·
OSTI ID:6198625
Related Subjects
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
DATA
DIFFRACTION
EXPERIMENTAL DATA
INFORMATION
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LOW TEMPERATURE
NUMERICAL DATA
ORTHORHOMBIC LATTICES
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SCATTERING
TETRAGONAL LATTICES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VERY LOW TEMPERATURE
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
DATA
DIFFRACTION
EXPERIMENTAL DATA
INFORMATION
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LOW TEMPERATURE
NUMERICAL DATA
ORTHORHOMBIC LATTICES
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SCATTERING
TETRAGONAL LATTICES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VERY LOW TEMPERATURE
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES