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

V. Pukhkaya (1) , F. Trompier (2) , Nadège Ollier (1)

1 LSI - Laboratoire des Solides Irradiés - Irradiated Solids Laboratory
2 IRSN - Institut de Radioprotection et de Sûreté Nucléaire

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 Q(2) tetrahedra amount supporting the structure of r-POHC. Ultra-phosphate glasses contain the larger defect type: Peroxy radicals, P-1, P-2, and P-4 defects whose formation is linked to Q(3) tetrahedra presence. In meta-phosphate and poly-phosphate glasses, peroxy radicals appear with r-POHC thermal recovery. In meta-phosphate glasses, a combination of P-1 and P-3 defects was evidenced for the first time, whereas in poly-phosphate glasses, only P-3 defects were identified. Dose effect as well as defect recovery were analyzed. (C) 2014 AIP Publishing LLC.

Mots clés: ELECTRON-SPIN-RESONANCE; CENTERS; EPR

Domaines: Matière Condensée [cond-mat]

V. Pukhkaya, F. Trompier, Nadège Ollier. New insights on P-related paramagnetic point defects in irradiated phosphate glasses: Impact of glass network type and irradiation dose. Journal of Applied Physics, 2014, 116 (12), pp.123517. ⟨10.1063/1.4896876⟩. ⟨hal-01087211⟩