Structural and Electrical Behavior of Double Perovskite Material Sr2NiMoO6-δ
Structural and Electrical Behavior of Double Perovskite Material Sr2NiMoO6-δ
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双钙钛矿材料Sr2NiMoO6-δ的结构和电学行为
DOI：
10.1166/asl.2014.5383
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Prabhakar P Singh
中科院分区：
文献类型：
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作者：
Pravin Kumar;R. Singh;Prabhakar P Singh
双钙钛矿体系，Sr2NiMoO6−δ，是通过简单的溶胶-凝胶技术合成的。采用粉末X射线衍射技术对制备的样品进行相研究，证实了单相的形成。 Sr2NiMoO6−δ 的 Rietveld 分析揭示了室温下具有空间群 I4/m 的四方晶体几何形状。通过在 1573 K 下烧结粉末获得了 Sr2NiMoO6−δ 的良好结晶单相。所制备样品的频率和温度依赖性电导率表明，传导行为遵循移动电荷载流子的跳跃机制。所研究系统的 XPS 光谱表明存在不同价态的 Mo（Mo5+ 和 Mo6+）。
Double perovskite system, Sr2NiMoO6−δ , was synthesized via facile sol–gel technique. Phase investigation of the prepared sample was carried out employing powder X-ray diffraction technique, which confirmed the single phase formation. The Rietveld analysis of the Sr2NiMoO6−δ revealed tetragonal crystal geometry at room temperature with space group I4/m. A well crystalline single phase of Sr2NiMoO6−δ was obtained by sintering of the powder at 1573 K. Frequency and temperature dependent electrical conductivity of the prepared sample revealed that the conduction behavior followed hopping mechanism of the mobile charge carriers. The XPS spectra of the investigated system indicated the presence of different valence state of Mo (Mo5+ and Mo6+).