Magnetically Frustrated Double Perovskites: Synthesis, Structural Properties, and Magnetic Order of Sr2BOsO6 (B = Y, In, Sc)1. Issue 2 (3rd February 2015)

• Record Type: Journal Article
• Authors: Paul, Avijit Kumar; Sarapulova, Angelina; Adler, Peter; Reehuis, Manfred; Kanungo, Sudipta; Mikhailova, Daria; Schnelle, Walter; Hu, Zhiwei; Kuo, Changyang; Siruguri, Vasudeva; Rayaprol, Sudhindra; Soo, Yunlian; Yan, Binghai; Felser, Claudia; Hao Tjeng, Liu; Jansen, Martin
• Is Part Of: Zeitschrift für anorganische und allgemeine Chemie. Volume 641:Issue 2(2015)
• Page Start: 197
• Page End: 205
• Publication Date: 2015-02-03
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1002/zaac.201400590
• Languages: English
• ISSNs: 0044-2313

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p> Double perovskites Sr₂<italic>B</italic>OsO₆ (<italic>B</italic> = Y, In, and Sc) were prepared from the respective binary metal oxides, and their structural, magnetic, and electronic properties were investigated. At room temperature all these compounds crystallize in the monoclinic space group <italic>P</italic>2₁/<italic>n</italic>. They contain magnetic osmium (Os⁵⁺, <italic>t</italic>_2g³) ions and are antiferromagnetic insulators with Néel temperatures <italic>T</italic>_N = 53 K, 26 K, and 92 K for <italic>B</italic> = Y, In, and Sc, respectively. Powder neutron diffraction studies on Sr₂YOsO₆ and Sr₂InOsO₆ showed that the crystal structures remain unchanged down to 3 K. The Y and In compounds feature a type I antiferromagnetic spin structure with ordered Os moments of 1.91 μ_B and 1.77 μ_B, respectively. The trend in <italic>T</italic>_N does not simply follow the development of the lattice parameters, which suggests that d⁰ compared to d¹⁰ ions on the <italic>B</italic> site favor a somewhat different balance of exchange interactions in the frustrated Os⁵⁺<italic>fcc</italic>‐like lattice.</p> </abstract>