6533b861fe1ef96bd12c4c5c

RESEARCH PRODUCT

Optically detected magnetic resonance investigation of a luminescent oxygen–vacancy complex in Mn-doped LiBaF3

Stefan SchweizerUldis RogulisB. Henke

subject

PhotoluminescenceChemistryDopingCondensed Matter Physicslaw.inventionCrystallographyNuclear magnetic resonanceImpuritylawVacancy defectExcited stateGeneral Materials ScienceTriplet stateLuminescenceElectron paramagnetic resonance

description

The structure of an oxygen-related luminescence centre in manganese-doped LiBaF 3 was investigated by means of photoluminescence (PL) and PL-detected electron paramagnetic resonance. At 20 K an oxygen-related complex shows two luminescence bands peaking at about 430 and 475 nm, when excited at 220 nm. These bands can be attributed to 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 is believed to be next to a Mn 2+ impurity on a Ba 2+ site and can be described as an oxygen on a fluorine lattice site with a nearest fluorine vacancy along the (110) direction.

https://doi.org/10.1088/0953-8984/18/5/010