Oxygen diffusion in La/sub 2-//sub x/Sr/sub x/CuO/sub 4-//sub y/
Journal Article
·
· J. Mat. Res.; (United States)
OSTI ID:5485002
Diffusion of /sup 18/O in the superconductor La/sub 2-//sub x/Sr/sub x/CuO/sub 4-//sub y/ has been measured as a function of x (0 to 0.20) between 300 and 500 /sup 0/C at an oxygen partial pressure of approx. =1 atm. Concentration profiles were obtained using a secondary ion mass spectrometer. The diffusion coefficient decreases with increasing Sr additions from 0.1 to 0.2, primarily because of an increase in activation energy. This result, which is contradictory to the expectation that the diffusion coefficient should increase with increasing vacancy concentration caused by the added Sr, can be explained if oxygen vacancies are bound to Sr clusters. Measurements on samples with x = 0 or 0.05 were unsuccessful, probably because of porosity.
- Research Organization:
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5485002
- Journal Information:
- J. Mat. Res.; (United States), Journal Name: J. Mat. Res.; (United States) Vol. 3:1; ISSN JMREE
- Country of Publication:
- United States
- Language:
- English
Similar Records
Oxygen diffusion in high T/sub c/-superconductors. [La/sub 2-x/Sr/sub x/CuO/sub 4-y/ and YBa/sub 2/Cu/sub 3/O/sub 7(1-delta)/]
Oxygen tracer diffusion in La[sub 2[minus]x]Sr[sub x]CuO[sub 4[minus]y] single crystals
Oxygen-vacancy behavior in La/sub 2-//sub x/Sr/sub x/CuO/sub 4-//sub y/ by positron annihilation and oxygen diffusion
Conference
·
Wed Dec 31 23:00:00 EST 1986
·
OSTI ID:5848486
Oxygen tracer diffusion in La[sub 2[minus]x]Sr[sub x]CuO[sub 4[minus]y] single crystals
Journal Article
·
Wed Sep 01 00:00:00 EDT 1993
· Journal of the American Ceramic Society; (United States)
·
OSTI ID:5907526
Oxygen-vacancy behavior in La/sub 2-//sub x/Sr/sub x/CuO/sub 4-//sub y/ by positron annihilation and oxygen diffusion
Journal Article
·
Tue Sep 01 00:00:00 EDT 1987
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6254765
Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTIVATION ENERGY
ALKALINE EARTH METAL COMPOUNDS
ATOM TRANSPORT
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DIFFUSION
EMISSION
ENERGY
EVEN-EVEN NUCLEI
HIGH TEMPERATURE
ISOTOPES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LIGHT NUCLEI
LOW PRESSURE
MASS SPECTROMETERS
MEASURING INSTRUMENTS
MEDIUM PRESSURE
MEDIUM TEMPERATURE
NEUTRAL-PARTICLE TRANSPORT
NUCLEI
OXIDES
OXYGEN 18
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
POROSITY
RADIATION TRANSPORT
RARE EARTH COMPOUNDS
SECONDARY EMISSION
SPECTROMETERS
STABLE ISOTOPES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTIVATION ENERGY
ALKALINE EARTH METAL COMPOUNDS
ATOM TRANSPORT
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DIFFUSION
EMISSION
ENERGY
EVEN-EVEN NUCLEI
HIGH TEMPERATURE
ISOTOPES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LIGHT NUCLEI
LOW PRESSURE
MASS SPECTROMETERS
MEASURING INSTRUMENTS
MEDIUM PRESSURE
MEDIUM TEMPERATURE
NEUTRAL-PARTICLE TRANSPORT
NUCLEI
OXIDES
OXYGEN 18
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
POROSITY
RADIATION TRANSPORT
RARE EARTH COMPOUNDS
SECONDARY EMISSION
SPECTROMETERS
STABLE ISOTOPES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS