| Autor: |
Jin, Jia-Rui, Wu, Shao-Yi, Hong, Jian, Liu, Shi-Nan, Song, Min-Xian, Teng, Bao-Hua, Wu, Ming-He |
| Předmět: |
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| Zdroj: |
Philosophical Magazine; Nov2017, Vol. 97 Issue 31, p2858-2870, 13p |
| Abstrakt: |
The local structures and electron paramagnetic resonance (EPR) parameters for Cu2+in 59B2O3–10K2O–(30−x)ZnO–xBaO–1CuO (BKZBC) glasses are theoretically investigated with distinct modifier BaO concentrationsx(= 0, 6, 12, 18, 24 and 30 mol %). Theclusters are found to undergo the relative tetragonal elongations of about 13.5 and 5.0% at zero and higher BaO concentrations. The concentration dependences of the measured d–d transition bands,gfactors andA//are suitably reproduced from the Fourier type functions or sign functions of the relevant quantities withxby using only six adjustable parameters. The features of the EPR parameters and the local structures of Cu2+are analysed in a consistent way by considering the differences in the local ligand field strength and electronic cloud admixtures around Cu2+under addition of Ba2+with the highest ionicity and polarisability. The present theoretical studies would be helpful to the researches on the structures, optical and EPR properties for the similar potassium barium zinc borate glasses containing copper with variation concentration of modifier BaO. [ABSTRACT FROM PUBLISHER] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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