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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Vibrational, EPR and optical spectroscopy of the Cu~(2+) doped glasses with (90-x)TeO_2-10GeO_2-xWO_3 (7.5 ≤ x ≤ 30) composition
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Vibrational, EPR and optical spectroscopy of the Cu~(2+) doped glasses with (90-x)TeO_2-10GeO_2-xWO_3 (7.5 ≤ x ≤ 30) composition

机译：（90-x）TeO_2-10GeO_2-xWO_3（7.5≤x≤30）成分的Cu〜（2+）掺杂玻璃的振动，EPR和光谱学

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摘要

Infrared, EPR and optical absorption studies on (90-x)TeO _2-10GeO_2-xWO_3 (7.5 ≤ x ≤ 30) glasses containing Cu~(2+) spin probe have been carried out. The Infrared spectral studies show that the structure of glass network consists of [TeO _4], [TeO_3]/[TeO_(3 + 1)], [WO_4], [WO_6] and [GeO_6] units in the disordered manner. Physical parameters such as density (ρ), molar volume (V_m), oxygen packing density (OPD), oxygen molar volume (V_o), optical basicity (Λ), oxide ion polarizability (αO~(2-)), inter ionic distances and the concentration of ions per unit volume of Te, Ge, W, Cu and O have been determined. The spin-Hamiltonian parameters (g||, g ∥ and A_(||)) of Cu~(2+) ions in the present glasses have been estimated from EPR spectra at 300 K. Bonding parameters such as α~2, β_1~2, β~2, Γ_σ, and Γ_π have been calculated from both optical absorption and EPR data. The observed variations in spin-Hamiltonian parameters and bonding parameters have been correlated to the structural modifications due to the WO_3 incorporation into the TeO_2 glass network at constant 10 mol% GeO_2 content.
机译：对含Cu〜（2+）自旋探针的（90-x）TeO _2-10GeO_2-xWO_3（7.5≤x≤30）玻璃进行了红外，EPR和光吸收研究。红外光谱研究表明，玻璃网络的结构由[TeO _4]，[TeO_3] / [TeO_（3 +1）]，[WO_4]，[WO_6]和[GeO_6]单元无序组成。物理参数，例如密度（ρ），摩尔体积（V_m），氧堆积密度（OPD），氧摩尔体积（V_o），光学碱度（Λ），氧化物离子极化率（αO〜（2-）），离子间距离确定了每单位体积的Te，Ge，W，Cu和O的离子浓度。本玻璃中Cu〜（2+）离子的自旋哈密顿参数（g ||，g∥和A_（||））是根据300 K的EPR光谱估算的。键合参数如α〜2，β_1从光吸收和EPR数据计算出〜2，β〜2，Γ_σ和Γ_π。由于在恒定的10 mol％GeO_2含量下将WO_3掺入TeO_2玻璃网络中，自旋哈密顿参数和键合参数的观察到的变化已与结构修饰相关。

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