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首页> 外文期刊>Physica, B. Condensed Matter >EPR and optical absorption study of Cu2+-doped lithium potassium sulphate single crystals
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EPR and optical absorption study of Cu2+-doped lithium potassium sulphate single crystals

机译：掺杂Cu2 +的硫酸锂钾钾单晶的EPR和光吸收研究

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摘要

EPR spectra of Cu2+ ion doped in lithium potassium sulphate single crystal at room temperature are reported. The observed spectra are fitted to a spin Hamiltonian of orthorhombic symmetry with Cu2+ (site I) g(x) = 2.0930, g(y) = 2.1421, g(z) = 2.2900 (+/- 0.0002) and A(x) = 85, A(y) = 89, A(z) = 184 (+/- 2 x 10(-4) cm(-1)); Cu2+ (site II) g(x) = 2.0795, g(y) = 2.1580, g(z) = 2.2876 (+/- 0.0002) and A(x) = 93, A(y) = 95, A(z) = 189 (+/- 2 x 10(-4) cm(-1)); respective errors given in brackets. Copper enters the lattice substitutionally and is trapped at two magnetically inequivalent sites. The ground state wave function of the Cu2+ ion in this lattice is determined as predominantly |x(2)-y(2)>. The g-factor anisotropy is calculated and compared with the experimental value. The optical absorption of the crystal at room temperature is also recorded. Further, with the help of the optical absorption and EPR data, the nature of bonding in the complex is discussed.
机译：报道了在室温下硫酸锂钾单晶中掺杂的Cu2 +离子的EPR谱。观察到的光谱适合于正交对称的自旋哈密顿量，Cu2 +（位点I）g（x）= 2.0930，g（y）= 2.1421，g（z）= 2.2900（+/- 0.0002）和A（x）= 85，A（y）= 89，A（z）= 184（+/- 2 x 10（-4）cm（-1））; Cu 2+（位点II）g（x）= 2.0795，g（y）= 2.1580，g（z）= 2.2876（+/- 0.0002）和A（x）= 93，A（y）= 95，A（z） = 189（+/- 2 x 10（-4）cm（-1））;括号中给出了相应的错误。铜取代地进入晶格，并被困在两个磁不等价的位置。确定该晶格中Cu 2+离子的基态波函数主要为| x（2）-y（2）>。计算出g因子各向异性并将其与实验值进行比较。还记录了室温下晶体的光吸收。此外，借助光吸收和EPR数据，讨论了配合物中键合的性质。

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