TY - JOUR
T1 - High pressure effect on structural and spectroscopic properties of Sm3+-doped alkali silicate glasses
AU - Montoya Matos, Israel Roger
AU - Balzaretti, Naira Maria
N1 - Funding Information:
This work was supported by Conselho Nacional de Desenvolvimento Científico e Tecnológico [grant number 442122/2014-4]; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior; Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul [grant number 2354-2551/14-3].
Publisher Copyright:
© 2017 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2017/7/3
Y1 - 2017/7/3
N2 - Structural and spectroscopic properties of Sm3+-doped alkali silicate glasses were investigated after densification at 7.7 GPa in a large volume high pressure apparatus. The glass composition was 33M2O + 66SiO2 + 1Sm2O3, where M = Li, Na or K. Raman and infrared spectroscopy revealed small changes in the vibrational modes dependent on the alkali ion. Irreversible changes were observed in the optical absorption spectra of Sm3+ ions. The Judd–Ofelt parameters were calculated to evaluate the effect of pressure on the local field. For lithium silicate, Ω2 parameter increased, suggesting the densification increased the local asymmetry of the Sm3+ environment. For sodium silicate, this parameter decreased considerably, suggesting the opposite effect on the local field, while for potassium silicate, it remained practically unchanged. The changes induced by high pressure are probably due to the irreversible changes in the distances and bond angles between the rare earth ion and the ligands.
AB - Structural and spectroscopic properties of Sm3+-doped alkali silicate glasses were investigated after densification at 7.7 GPa in a large volume high pressure apparatus. The glass composition was 33M2O + 66SiO2 + 1Sm2O3, where M = Li, Na or K. Raman and infrared spectroscopy revealed small changes in the vibrational modes dependent on the alkali ion. Irreversible changes were observed in the optical absorption spectra of Sm3+ ions. The Judd–Ofelt parameters were calculated to evaluate the effect of pressure on the local field. For lithium silicate, Ω2 parameter increased, suggesting the densification increased the local asymmetry of the Sm3+ environment. For sodium silicate, this parameter decreased considerably, suggesting the opposite effect on the local field, while for potassium silicate, it remained practically unchanged. The changes induced by high pressure are probably due to the irreversible changes in the distances and bond angles between the rare earth ion and the ligands.
KW - alkali silicates
KW - High pressure
KW - luminescence
KW - samarium
UR - http://www.scopus.com/inward/record.url?scp=85020495543&partnerID=8YFLogxK
U2 - 10.1080/08957959.2017.1339796
DO - 10.1080/08957959.2017.1339796
M3 - Artículo (Contribución a Revista)
AN - SCOPUS:85020495543
SN - 1477-2299
VL - 37
SP - 296
EP - 311
JO - Journal High Pressure Research
JF - Journal High Pressure Research
IS - 3
M1 - Volume 37,2017_Issue 3
ER -