Published September 1993
| Version v1
Journal article
Oxygen tracer diffusion in La2-xSrxCuO4-y single crystals
- 1. Massachusetts Inst. of Tech., Cambridge, MA (United States). Crystal Physics and Optical Electronics Lab., Center for Materials Science and Engineering
- 2. Max-Planck-Inst. fuer Festkoerperforschung (Germany)
Description
The tracer diffusion of 18O in La2-xSrxCuO4-y single crystals (x = 0 to 0.12) has been measured from 400 to 700 C in 1 atm of oxygen using SIMS analysis. Evidence for diffusion by a vacancy mechanism was found at low strontium contents. Oxygen diffusivities for x ≥ 0.07 were depressed by several orders of magnitude below the diffusivity for undoped La2CuO4±y. The observed effects of strontium doping on oxygen diffusivity are discussed in terms of defect chemical models. The decreasing oxygen diffusivity with increasing strontium was attributed to the ordering of oxygen vacancies at large defect concentrations. A diffusion anisotropy, Dab/Dc, of ∼600 was also found at 500 C
Additional details
Publishing Information
- Journal Title
- Journal of the American Ceramic Society
- Journal Volume
- 76
- Journal Issue
- 9
- Journal Page Range
- p. 2363-2369.
- ISSN
- 0002-7820
- CODEN
- JACTAW
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 25014236
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ATOM TRANSPORT; COPPER OXIDES; CRYSTALS; DIFFUSION; LANTHANUM OXIDES; OXYGEN; OXYGEN 18; STRONTIUM OXIDES; TRACER TECHNIQUES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; ELEMENTS; EVEN-EVEN NUCLEI; ISOTOPE APPLICATIONS; ISOTOPES; LANTHANUM COMPOUNDS; LIGHT NUCLEI; NEUTRAL-PARTICLE TRANSPORT; NONMETALS; NUCLEI; OXIDES; OXYGEN COMPOUNDS; OXYGEN ISOTOPES; RADIATION TRANSPORT; RARE EARTH COMPOUNDS; STABLE ISOTOPES; STRONTIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS