|Title:||La2MnVO6 double perovskite: A structural, magnetic and X-ray absorption investigation|
Van Tendeloo G.
|Published in:||Journal of Materials Chemistry|
|Abstract:||The synthesis, electron diffraction (ED), synchrotron X-ray and neutron structure, X-ray absorption spectroscopy (XAS) and magnetic property studies of La2MnVO6 double perovskite are described. Analysis of the synchrotron powder X-ray diffraction data for La2MnVO6 indicates a disordered arrangement of Mn and V at the B-site of the perovskite structure. Absence of super-lattice reflections in the ED patterns for La 2MnVO6 supports the disordered cation arrangement. Room temperature time-of-flight (TOF) neutron powder diffraction (NPD) data show no evidence of cation ordering, in corroboration with the ED and synchrotron studies (orthorhombic Pnma, a = 5.6097(3), b = 7.8837(5) and c = 5.5668(3) ; 295 K, NPD). A comparison of XAS analyses of La2TVO6 with T = Ni and Co shows T2+ formal oxidation state while the T = Mn material evidences a Mn3+ admixture into a dominantly Mn2+ ground state. V-K edge measurements manifest a mirror image behavior with a V 4+ state for T = Ni and Co with a V3+ admixture arising in the T = Mn material. The magnetic susceptibility data for La 2MnVO6 show ferromagnetic correlations; the observed effective moment, eff (5.72 B) is much smaller than the calculated moment (6.16 B) based on the spin-only formula for Mn 2+ (d5, HS) /V4+ (d1), supportive of the partly oxidized Mn and reduced V scenario (Mn3+/V3+). Â© The Royal Society of Chemistry 2009.|
|Citation:||Journal of Materials Chemistry (2009), 19(25): 4382-4390|
|Author Scopus IDs:||57200780613|
|Author Affiliations:||Mandal, T.K., Department of Chemistry and Chemical Biology, Rutgers, State University of New Jersey, 610 Taylor Road, Piscataway, NJ 08854, United States|
Croft, M., Department of Physics and Astronomy, Rutgers, State University of New Jersey, 136 Frelinghuysen Road, Piscataway, NJ 08854, United States
Hadermann, J., Electron Microscopy for Materials Research (EMAT), University of Antwerp, Groenenborgerlaan 171 B-2020, Antwerp, Belgium
Van Tendeloo, G., Electron Microscopy for Materials Research (EMAT), University of Antwerp, Groenenborgerlaan 171 B-2020, Antwerp, Belgium
Stephens, P.W., Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, United States
Greenblatt, M., Department of Chemistry and Chemical Biology, Rutgers, State University of New Jersey, 610 Taylor Road, Piscataway, NJ 08854, United States
|Corresponding Author:||Greenblatt, M.; Department of Chemistry and Chemical Biology, Rutgers, State University of New Jersey, 610 Taylor Road, Piscataway, NJ 08854, United States; email: email@example.com|
|Appears in Collections:||Journal Publications [CY]|
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