La 2CoMnO 6-δ crystal doped with Pb and Pt was successfully grown. The lattice parameters were determined by X-ray diffractometry, while polarized Raman spectroscopy and magnetic measurements were used to probe the Co/Mn positional order, and to suggest the most likely crystal and magnetic structures. The magnetic response of the crystal to ac- and dc-magnetic fields is discussed in terms of possible occupation of the crystallographic positions by the constituent ions and valence state disproportion in the Mn/Co ions. The results are explained within a framework of statistically random distributed Mn 3+OMn 4+ and Co 2+OPt 4+ chains within the predominantly ordered Co 2+/Mn 4+ double perovskite structure. © 2012 Elsevier Ltd. All rights reserved.
|Journal||Materials Research Bulletin|
|Publication status||Published - 1 Dec 2012|
- A. Oxides
- C. Raman spectroscopy
- D. Crystal structure
- D. Magnetic properties