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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/4025
Title: Synthesis, structure, and magnetic properties of SrLaMnSbO6: A new B-site ordered double perovskite
Authors: Mandal T.K.
Abakumov A.M.
Lobanov M.V.
Croft M.
Poltavets V.V.
Greenblatt M.
Published in: Chemistry of Materials
Abstract: The synthesis, structural characterization, and magnetic property studies of SrLaMnSbO6 double perovskite oxide are reported. The crystal structure of SrLaMnSbO6 has been solved by powder X-ray (PXD) and neutron diffraction (NPD) data in the monoclinic space group P21/nfn (a = 5.6878(3) Ã…, b = 5.6990(2) Ã…, c = 8.0499(4) Ã…and β= 89.98(2)°; 295 K, NPD data). The Mn and Sb atoms are nearly completely ordered over the B-site of the perovskite structure. The octahedral framework displays significant tilting distortion according to the Glazer's tilt system a- a- c+. X-ray absorption near-edge spectroscopic (XAS) studies show the presence of Mn2+ and Sb 5+ formal oxidation states. The magnetic susceptibility data of SrLaMnSbO6 indicate the presence of ferromagnetic correlations; the calculated effective paramagnetic moment, μcaled = 5.92 μB (for HS Mn2+(3d5), S = 5/2; as evidenced by XAS data) is in good agreement with the value obtained experimentally (μexp = 5.70 μB). Variable temperature neutron diffraction data show no evidence of structural transition down to 3.7 K. A long-range antiferromagnetic ordering is established at TN = 8 K as evidenced by the magnetic susceptibility and specific heat measurements. The magnetic structure at 3.7 K is characterized by k = 0 propagation vector and m1x = -m2x, m1y = m2y = 0, m 1z = -m2z (mx = 1.26(7) μB, mz = 1.82(6) μB) coupling of magnetic moments on the Mn1 (1/2,0,0) and Mn2 (0,1/2,1/2) atoms with the ordered magnetic moment of 2.21(4) © 2008 American Chemical Society.
Citation: Chemistry of Materials (2008), 20(14): 4653-4660
URI: https://doi.org/10.1021/cm800583e
http://repository.iitr.ac.in/handle/123456789/4025
Issue Date: 2008
ISSN: 8974756
Author Scopus IDs: 57200780613
55532574400
7007108936
56242957000
7004054790
7102535684
Author Affiliations: Mandal, T.K., Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey, Piscataway, NJ 08854, United States
Abakumov, A.M., Department of Chemistry, Moscow State University, Moscow 119991, Russian Federation
Lobanov, M.V., R and D Department, Huntsman-NMG, Obninsk 249032, Russian Federation
Croft, M., Department of Physics and Astronomy, Rutgers, the State University of New Jersey, Piscataway, NJ 08854, United States
Poltavets, V.V., Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey, Piscataway, NJ 08854, United States
Greenblatt, M., Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey, Piscataway, NJ 08854, United States
Corresponding Author: Greenblatt, M.; Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey, Piscataway, NJ 08854, United States; email: martha@rutchem.rutgers.edu
Appears in Collections:Journal Publications [CY]

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