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Crystallographic, optical and dielectric properties of gel grown praseodymium malonate single crystals

机译：凝胶生长镨丙二酸盐单晶的晶体，光学和介电性能

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摘要

Single crystals of praseodymium malonate hexahydrate are grown by gel encapsulation technique. Single and powder X-ray diffraction data obtained on these crystals is analysed and the internal structure and molecular configuration are determined. The analysis of the crystallographic data shows that the compound crystallises in a monoclinic crystal system with a space group of P2/m. The compound adopts an extended 3-D framework, stabilized by extensive hydrogen bonding. High resolution X-ray diffraction results suggest that the crystals grown are of good quality. The optical characteristics, as obtained from UV-Vis-NIR spectral data, are described. The direct forbidden energy band gap is calculated to be 5.4 eV. Results of photoluminescence, refractive index and birefringence measurements are described and discussed. It is shown that the material has a low dielectric constant and so can be a promising material for microelectronic device applications. The dependence of the dielectric constant, dielectric loss and conductivity on the frequency of the applied ac field is described and discussed. The results are correlated with those of optical and high resolution X-ray diffraction.
机译：丙二酸丙酸盐六水合物的单晶是通过凝胶包封技术生长。分析在这些晶体上获得的单一和粉末X射线衍射数据，确定内部结构和分子配置。对晶体数据的分析表明，该化合物在单斜晶体系中结晶，其具有P2 / m的空间组。该化合物采用延伸的3-D框架，通过广泛的氢键稳定。高分辨率X射线衍射结果表明，生长的晶体具有质量优良。描述从UV-Vis-NIR光谱数据获得的光学特性。直接禁止能带隙计算为5.4eV。描述并讨论了光致发光，折射率和双折射测量结果。结果表明，该材料具有低介电常数，并且可以是微电子器件应用的有希望的材料。描述和讨论介电常数，介电损耗和电导率对所施加的交流场的频率的依赖性。结果与光学和高分辨率X射线衍射相关。

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  • 来源
    《RSC Advances》 |2015年第114期|共10页
  • 作者

    Nazir Ahmad; M. M. Ahmad; P. N. Kotru;

  • 作者单位

    Condensed Matter Physics Laboratory Department of Physics National Institute of Technology Hazratbal Srinagar - 190006 Jammu and Kashmir India.;

    Condensed Matter Physics Laboratory Department of Physics National Institute of Technology Hazratbal Srinagar - 190006 Jammu and Kashmir India.;

    Crystal Growth and Materials Research Laboratory Department of Physics and Electronics University of Jammu Jammu-180006 India.;

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