Structural and magnetic characterisation of CoSb2O4, and the substitution of Pb2+ for Sb3+

Benjamin De Laune, Colin Greaves

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The nuclear and magnetic structures of the synthetic schafarzikite related material CoSb2O4 have been determined from neutron powder diffraction data. The compound is tetragonal (P4(2)/mbc) with refined lattice constants at 300 K of, a=8.49340(9) angstrom, c=5.92387(8) angstrom. The magnetic ordering is shown to be consistent with a C mode with moments aligned along [0 0 1]. Magnetic susceptibility measurements indicate a canted antiferromagnetic ground state, for which the ferromagnetic component shows unusually high coercivity. The thermal stability of CoSb2O4 in air is reported. The substitution of Pb2+ for Sb3+ has been investigated and found to cause oxidation of both Co2+ to Co3+ and Sb3+ to Sb5+. (C) 2012 Elsevier Inc. All rights reserved.
Original languageEnglish
Pages (from-to)225-230
Number of pages6
JournalJournal of Solid State Chemistry
Volume187
DOIs
Publication statusPublished - 1 Mar 2012

Keywords

  • CoSb2O4
  • Pb substitution
  • Cobalt antimony oxide
  • Magnetic structure

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