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The First Sharp Diffraction Peak in the Total Structure Function of Amorphous Chalcogenide Glasses: Anomalous Characteristics and Controversial Views
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作者 Moneeb T. M. Shatnawi 《New Journal of Glass and Ceramics》 2016年第3期37-46,共11页
Anomalous structural characteristics of the so-called first sharp diffraction peak (FSDP) that arises in the total static structure functions of network-forming glasses and liquids at around 1-2 A<sup>-1<... Anomalous structural characteristics of the so-called first sharp diffraction peak (FSDP) that arises in the total static structure functions of network-forming glasses and liquids at around 1-2 A<sup>-1</sup> have been reviewed and discussed in details. Unlike other peaks in the static structure functions, the FSDP has anomalous dependencies on temperature, pressure and composition. Despite the fact that the FSDP is considered as a signature of intermediate range order (IRO) in network-forming glasses and liquids, its structural origin remains unclear and till now, it forms a subject of debate. A brief account for some anomalous characteristics of the FSDP followed by the different controversial interpretations about its structural origin has been reviewed and discussed. Some of the interpretations that seem to be inconsistent with recent experimental results have been ruled out. The most likely structural origins for the occurrence of the FSDP have been highlighted and discussed in details. 展开更多
关键词 First Sharp diffraction peak (FSDP) Intermediate-Range Order (IRO) Amorphous Chalcogenide Glasses Static Structure Function diffraction
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X-ray Comparative Analysis of Rhubarb in Different Production Areas of Qinghai 被引量:1
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作者 王宁芳 拉本 《Agricultural Science & Technology》 CAS 2009年第6期119-120,124,共3页
[Objective] The aim of this study was to provide a basis for distinguishing quality of rhubarb in different production areas. [Method ] X-ray diffraction patterns of rhubarbs in different production areas of Qinghai w... [Objective] The aim of this study was to provide a basis for distinguishing quality of rhubarb in different production areas. [Method ] X-ray diffraction patterns of rhubarbs in different production areas of Qinghai were obtained by X-ray diffraction analysis, and then its similarity analysis was also investigated. [ Result] The content of chemical components in rhubarbs from different production areas had differences, but its diffraction patterns and diffraction peaks had certain fingerprint characteristics. [ Conclusion] X-ray diffraction method is a fast and effective method for identifying rhubarb and other Chinese herbal medicines in different production areas. 展开更多
关键词 RHUBARB X-RAY diffraction map diffraction peak Fingerprint characteristics
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Nonepitaxial growth of a (001) textured L1_0 Fe-Pt film in H_2 and N_2 annealing atmospheres
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作者 WU Peiwen HU Xuerang QIAN Jun YUAN Jun 《Rare Metals》 SCIE EI CAS CSCD 2006年第3期260-264,共5页
A nonepitaxial (001) textured Fe-Pt alloyed film was obtained by annealing Fe/Pt multilayers in H2. No Such nonepitaxial (001) texture was observed for similar multilayers annealed in N2 atmosphere. Sensitive elec... A nonepitaxial (001) textured Fe-Pt alloyed film was obtained by annealing Fe/Pt multilayers in H2. No Such nonepitaxial (001) texture was observed for similar multilayers annealed in N2 atmosphere. Sensitive electron energy loss spectroscopy and the left shift of the L10 FePt (111) diffr cfion peak indicate oxidation in the N2 annealed samples. The oxidation dramatically degrades the (001) texture of the Fe-Pt fdm and induces the composition change in the alloyed layer. The relation between the texture formation and oxidation was discussed. 展开更多
关键词 metal (001) textured FePt ANNEALING oxidation shift of diffraction peak
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