Oxygen isotope effect on critical temperature and phonon modes in YBa/sub 2/Cu/sub 3/O/sub 7/

Journal Article · Thu Sep 01 04:00:00 EDT 1988 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.38.5025· OSTI ID:6844708

Benitez, E L; Lin, J J; Poon, S J; Farneth, W E; Crawford, M K; McCarron, E M

The effect of oxygen isotope substitution on YBa/sub 2/Cu/sub 3/O/sub 7/ has been studied. Powder samples in which approx.90% of the /sup 16/O has been replaced by /sup 18/O have been prepared by gas exchange and compared to /sup 16/O-/sup 16/O exchanged samples. The phonon frequencies, measured by far infrared spectroscopy, are reduced after /sup 18/O exchange. Magnetic measurements of the superconducting transition temperature find a shift of 0.16 +- 0.06 K, corresponding to ..cap alpha.. = 0.017 +- 0.006 in the Bardeen-Cooper-Schrieffer relation T/sub c/proportionalM/sup -//sup ..cap alpha../. .AE

• Research Organization: Department of Physics, University of Virginia, Charlottesville, Virgina 22901
• OSTI ID: 6844708
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:7; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
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
BCS THEORY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELEMENTS
FAR INFRARED RADIATION
INFRARED RADIATION
INFRARED SPECTRA
ISOTOPE EFFECTS
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHONONS
PHYSICAL PROPERTIES
POWDERS
QUASI PARTICLES
RADIATIONS
SPECTRA
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES