Structural and magnetic properties of double perovskite oxide Ba2CeSbO6

• Rietveld refinement of XRD confirms the ordered monoclinic crystal structure of Ba2CeSbO6.
• Vibrational properties of BCSO are studied using Raman and FTIR spectroscopies.
• The core level 3d XPS spectrum of Ce confirms the presence of Ce3+ and Ce4+ in BCSO.
• Anti-ferromagnetic long range order is found below 59 K.
• The presence of mixed valence states of Ce, the experimental magnetic moment becomes low.

The structural and magnetic properties of a double perovskite oxide Ba2CeSbO6 (BCSO) synthesized by solid state reaction technique have been investigated. The Rietveld refinement of the X-ray diffraction pattern of BCSO suggests the monoclinic crystal structure at room temperature with P21/n space group. The vibrational properties of BCSO are investigated by the Fourier transform Infrared and Raman spectroscopy. The Raman spectrum confirms the B-site ordering of cations in BCSO. The temperature dependent magnetic susceptibility data in the field cooled mode show the anti-ferromagnetic behaviour of BCSO below 59 K. The core level X-ray photoemission (XPS) spectrum of Ce-3d and Sb-3d states confirms the presence of multiple oxidation states of these cations. The presence of both the Ce3+ and Ce4+ ions in BCSO gives the 4f4−δ intermediate valence state which may reduce the effective magnetic moment with respect to the system having single valence Ce3+ ion.

Rietveld refinement suggests the monoclinic ordered crystal structure of an anti-ferromagnetic double perovskite Ba2CeSbO6. XPS study confirms the presence of two oxidation states of Ce.Figure optionsDownload as PowerPoint slide