Published April 1, 1988
| Version v1
Journal article
Oxygen-vacancy-formation enthalpy in YBa2(Cu/sub 0.985/Fe/sub 0.015/)3O/sub 7-//sub δ/ oxide superconductor
Creators
- 1. Department of Electrical and Computer Engineering, and Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221
Description
/sup 57/Fe Mossbauer spectra of YBa2(Cu/sub 0.985/Fe/sub 0.015/)3O/sub 7-//sub δ/ samples display multiple sites (n = A, B, C, and D) with the site intensity ratios I/sub n//I exhibiting profound thermal annealing effects in the temperature range 150 0C<T/sub a/<550 0C associated with oxygen desorption. Specifically, the ratio I/sub A//I is a function of T/sub a/, and displays an activation enthalpy of site formation ΔH/sub A/ = 104(3) meV. We ascribe it to the filling of O(1) oxygen vacancy sites in chains. The miniscule ΔH/sub A/ is probably the consequence of the under-coordinated nature of the orthorhombic structure which globally promotes a superelastic (soft) lattice
Additional details
Publishing Information
- Journal Title
- Phys. Rev., B: Condens. Matter
- Journal Volume
- 37
- Journal Issue
- 10
- Series
- Phys. Rev., B: Condens. Matter.
- Journal Page Range
- 5905-5908
- ISSN
- 0163-1829
- CODEN
- PRBMD
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 19062411
- Subject category
- S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- BARIUM OXIDES; COPPER OXIDES; HIGH TEMPERATURE; IMPURITIES; IRON 57; MOESSBAUER EFFECT; OXYGEN; SUPERCONDUCTORS; VACANCIES; YTTRIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; ELEMENTS; EVEN-ODD NUCLEI; INTERMEDIATE MASS NUCLEI; IRON ISOTOPES; ISOTOPES; NONMETALS; NUCLEI; OXIDES; OXYGEN COMPOUNDS; POINT DEFECTS; STABLE ISOTOPES; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS