Optical absorption and electron spin resonance studies of Cu2+ in Li2O�?�Na2O�?�B2O3�?�As2O3 glasses

[摘要] The local structure around Cu²⁺ ion has been examined by means of electron spin resonance and optical absorption measurements in 𝑥Li₂Oâ€�??(40 â€�?? ð‘�?)Na₂Oâ€�??50B₂O₃â€�??10As₂O₃ glasses. The site symmetry around Cu²⁺ ions is tetragonally distorted octahedral. The ground state of Cu²⁺ is $d_{x^2â€�?�y^2}$. The glass exhibited broad absorption band near infrared region and small absorption band around 548 nm, which was assigned to the ${}^{2}B_{1g} ightarrow {}^{2}E_{g}$ transition.

[学科分类] 材料工程

[关键词] Glass transition temperature;ESR;optical absorption;bonding parameters.