Studies of mixed former effect in EPR and optical absorption in xZnO-(75-x) Bi2O3-15B(2)O(3)-10Li(2)O glasses

作者：Bale Shashidhar^*; Rahman Syed

来源：Physica B: Condensed Matter , 2013, 418: 52-57.

DOI：10.1016/j.physb.2013.02.044

• Bismuthate glasses
• EPR
• Optical absorption
• Optical basicity
• Mixed former effect

Homogeneous glasses of the system xZnO-(75-x)Bi2O3-15B(2)O(3)-10Li(2)O containing 1 mol% of Cu2+ were obtained within 10 <= x <= 35 mol%. The spin-Hamiltonian parameters from EPR absorption spectra of Cu2+ revealed that g(parallel to) > g(perpendicular to) > g(e) (g(e) = 2.0023) and the ground state of Cu2+ is d(x2-y2) orbital (B-2(1g) state). The non-linear variation of the spin-Hamiltonian parameters with ZnO content was attributed to the mixed former effect. This effect is also evident in the optical absorption spectra. By correlating the EPR and optical absorption data, the bonding parameters alpha(2), beta(2) and beta(2)(1). have been evaluated and are correlated with optical basicity. In addition, the bonding parameters also varied non-linearly suggesting a mixed former effect.

• 出版日期2013-6-1