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Structural and magnetic properties of double perovskite oxide Ba2CeSbO6

Institution:	1. Department of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic Sciences, Block-JD, Sector-III, Salt Lake, Kolkata, 700 106, India;2. Department of Physics, Bose Institute, 93/1, Acharya Prafulla Chandra Road, Kolkata, 700009, India;3. UGC-DAE Consortium for Scientific Research, Kolkata Centre, III/LB-8, Salt Lake, Kolkata, 700098, India;4. Institute of Materials Research and Engineering, Agency for Science Technology and Research, 3 Research Link, Singapore, 117602, Singapore;1. Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany;2. Max Planck Institute for Solid State Research, 70569 Stuttgart, Germany;1. Department of Physics, Govt. Motilal Vigyan Mahavidyalya College, Bhopal 462008, MP, India;2. Department of Physics, NRI Institute of Research & Technology, Bhopal 462021, MP, India;3. Department of Physics, School of Chemical Engineering & Physical Sciences, Lovely Professional University, Phagwara 144411, Punjab, India;4. Department of Physics, S. N. P. G. College, Khandwa 450001, MP, India;5. Department of Physics, Barkatullah University, Bhopal 462026, MP, India;6. Department of Physics, Govt. S. N. Girls P.G College, Bhopal 462016, MP, India;1. Superconducting Properties Unit, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan;2. Graduate School of Chemical Sciences and Engineering, Hokkaido University, North 10 West 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan;3. Computational Materials Science Center, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan;4. Materials Analysis Station, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan;5. Materials Processing Unit, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan;6. Synchrotron X-ray Station at SPring-8, National Institute for Materials Science, Kohto 1-1-1, Sayo-cho, Hyogo 679-5148, Japan

Abstract:	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 4f^4−δ intermediate valence state which may reduce the effective magnetic moment with respect to the system having single valence Ce³⁺ ion.

Keywords:	Ceramics Photoelectron spectroscopy Crystal structure Magnetic properties
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