Synthesis, Crystal Structure, and Physical Properties of Sr2FeOsO6

PAUL AVIJIT K; JANSEN MARTIN; YAN BINGHAI; FELSER CLAUDIA; REEHUIS MANFRED; ABDALA, PAULA M.

INORGANIC CHEMISTRY

AMER CHEMICAL SOC

Lugar: Washington; Año: 2013 p. 6713 - 6719

0020-1669

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.