Synthesis, Crystal Structure, and Physical Properties of Sr2FeOsO6

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• 作者：Avijit Kumar Paul ; Martin Jansen ; Binghai Yan ; Claudia Felser ; Manfred Reehuis ; Paula M. Abdala
• 刊名：Inorganic Chemistry
• 出版年：2013
• 出版时间：June 3, 2013
• 年：2013
• 卷：52
• 期：11
• 页码：6713-6719
• 全文大小：412K
• 年卷期：v.52,no.11(June 3, 2013)
• ISSN：1520-510X

文摘

In the exploration of new osmium based double perovskites, Sr₂FeOsO₆ is a new insertion in the existing family. The polycrystalline compound has been prepared by solid state synthesis from the respective binary oxides. Powder X-ray diffraction (PXRD) analysis shows the structure is pseudocubic at room temperature, whereas low-temperature synchrotron data refinements reveal the structure to be tetragonal, space group I4/m. Heat capacity and magnetic measurements of Sr₂FeOsO₆ indicated the presence of two magnetic phase transitions at T₁ = 140 K and T₂ = 67 K. Band structure calculations showed the compound as a narrow energy gap semiconductor, which supports the experimental results obtained from the resistivity measurements. The present study documents significant structural and electronic effects of substituting Fe³⁺ for Cr³⁺ ion in Sr₂CrOsO₆.