title: Synthesis, crystal structure, and physical properties of Sr2FeOsO6.
abstract: 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 Fe(3+) for Cr(3+) ion in Sr2CrOsO6.
authors.affiliation: Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, Dresden 01187, Germany.
authors.forename: Avijit Kumar
authors.initials: AK
authors.lastname: Paul
authors.forename: Martin
authors.initials: M
authors.lastname: Jansen
authors.forename: Binghai
authors.initials: B
authors.lastname: Yan
authors.forename: Claudia
authors.initials: C
authors.lastname: Felser
authors.forename: Manfred
authors.initials: M
authors.lastname: Reehuis
authors.forename: Paula M
authors.initials: PM
authors.lastname: Abdala