6533b7d1fe1ef96bd125d62e
RESEARCH PRODUCT
Optically detected magnetic resonance investigation of oxygen luminescence centres in BaF2
Johann Martin SpaethStefan SchweizerUldis Rogulissubject
PhotoluminescenceChemistryCrystal structureCondensed Matter PhysicsCrystallographic defectMolecular physicslaw.inventionNuclear magnetic resonancelawVacancy defectExcited stateGeneral Materials ScienceTriplet stateLuminescenceElectron paramagnetic resonancedescription
The structure of two oxygen-related luminescence centres in oxygen-doped BaF2 was investigated by means of photoluminescence (PL) and photoluminescence-detected electron paramagnetic resonance (PL-EPR). One of the oxygen-related luminescences peaking at 2.83 eV is associated with an excited triplet state (S = 1) of an oxygen–vacancy complex with the z-axis of the fine-structure tensor parallel to the 110 direction. This complex can be described as an oxygen on a fluorine lattice site with a next-nearest fluorine vacancy along the 110 direction. The luminescence at 2.25 eV is also associated with a triplet state. Its PL-EPR spectrum is probably due to oxygen–vacancy complexes with a nearest fluorine vacancy along the 100 direction.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-07-04 | Journal of Physics: Condensed Matter |