Observation of orthorhombic-tetragonal phase equilibria in YBa/sub 2/Cu/sub 3-//sub x/Fe/sub x/O/sub 7-//sub delta/

Journal Article · Mon Aug 01 00:00:00 EDT 1988 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.38.2896· OSTI ID:6926892

Eibschuetz, M; Lines, M E; Tarascon, J M; Barboux, P

Recent orthorhombic-tetragonal (O-T) phase equilibria predicted by Khachaturyan and Morris have been observed experimentally in YBa/sub 2/Cu/sub 3-//sub x/Fe/sub x/O/sub 7/ (0.01less than or equal toxless than or equal to0.2) by Moessbauer techniques. The relative proportions of O and T phases are found to be functions of Fe concentration. The T phase grows from, and coexists with, the O phase as x increases. A nonzero fraction of T phase persists down to the smallest values of x. A model is presented to interpret the structural aspects of the O-T transition.

• Research Organization: ATandT Bell Laboratories, Murray Hill, New Jersey 07974
• OSTI ID: 6926892
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:4; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
EQUILIBRIUM
IRON COMPOUNDS
IRON OXIDES
MOESSBAUER EFFECT
ORTHORHOMBIC LATTICES
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
PHASE TRANSFORMATIONS
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES