Related Experiment Video
Updated: Mar 29, 2026

Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis
Published on: May 10, 2021
Electron Paramagnetic Resonance Study of Radiation-Induced Defects in Ba3(PO4)2
Henk Vrielinck1, Wouter Holvoet1, Dominykas Augulis1,2
1Department of Solid State Sciences, Ghent University, Krijgslaan 285-S1, B-9000 Gent, Belgium.
None:
We report an electron paramagnetic resonance (EPR) study of radiation-induced defects in Ba3(PO4)2, aiming to understand their role in radio-photoluminescence (RPL). Ba3(PO4)2 is a promising host for rare-earth dopants in optical and dosimetric applications. We compare the effects of ultraviolet (UV) and X-ray irradiation on the electron trapping by Eu3+, as well as the formation of intrinsic defects by radiation in Eu-doped and undoped samples. Both irradiation types generate Eu2+ centers with axial symmetry at one specific Ba lattice site, as confirmed by Q-band EPR. Additional EPR signals near g≈2 reveal radiation-induced centers unrelated to Eu dopants. Detailed analysis of X- and Q-band spectra identifies an H0 center and two electron-trapping defects, one tentatively assigned to an oxygen vacancy (F-type center). These findings pave the way for understanding the complex defect landscape governing charge trapping and stability in Ba3(PO4)2.
More Related Videos
08:00Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain
Published on: March 27, 2018
07:24Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
Published on: April 14, 2020
Related Concept Videos
Imperfections in Crystal Structure: Stoichiometric Point Defects
Electron Paramagnetic Resonance (EPR) Spectroscopy: Organic Radicals
Imperfections in Crystal Structure: Non-Stoichiometric Defects
Atomic Emission Spectroscopy: Lab