New insights on P-related paramagnetic point defects in irradiated phosphate glasses: Impact of glass network type and irradiation dose

P-related paramagnetic point defects were studied in irradiated Yb-doped phosphate glasses by electron paramagnetic resonance spectroscopy (X and Q-bands). A strong impact of the glass network type on the defect nature is shown. In all glasses, r-POHC defects formation is in strong correlation with...

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Bibliographic Details
Published in:Journal of applied physics 2014-09, Vol.116 (12)
Main Authors: Pukhkaya, V., Trompier, F., Ollier, N.
Format: Article
Language:English
Subjects:
Applied physics
Condensed Matter
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CORRELATIONS
CRYSTAL DEFECTS
DOPED MATERIALS
Electron paramagnetic resonance
ELECTRON SPIN RESONANCE
Glass
IRRADIATION
PARAMAGNETISM
PEROXY RADICALS
PHOSPHATE GLASS
PHOSPHATES
PHYSICAL RADIATION EFFECTS
Physics
POINT DEFECTS
Radiation dosage
RADIATION DOSES
Recovery
SPECTROSCOPY
YTTERBIUM ADDITIONS
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Summary:P-related paramagnetic point defects were studied in irradiated Yb-doped phosphate glasses by electron paramagnetic resonance spectroscopy (X and Q-bands). A strong impact of the glass network type on the defect nature is shown. In all glasses, r-POHC defects formation is in strong correlation with Q2 tetrahedra amount supporting the structure of r-POHC. Ultra-phosphate glasses contain the larger defect type: Peroxy radicals, P1, P2, and P4 defects whose formation is linked to Q3 tetrahedra presence. In meta-phosphate and poly-phosphate glasses, peroxy radicals appear with r-POHC thermal recovery. In meta-phosphate glasses, a combination of P1 and P3 defects was evidenced for the first time, whereas in poly-phosphate glasses, only P3 defects were identified. Dose effect as well as defect recovery were analyzed.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4896876