Physics – Condensed Matter – Materials Science
Scientific paper
2010-11-30
Dalton Trans. 39, 5490 (2010)
Physics
Condensed Matter
Materials Science
PDF; 27 pages, 9 figures
Scientific paper
The complex perovskite Ba2CoTeO6 (BCTO) has been synthesised, and the crystal structure and magnetic properties have been investigated using a combination of X-ray and neutron powder diffraction, electron microscopy and dielectric, calorimetric and magnetic measurements. It was shown that at room temperature this compound adopts the 6L-trigonal perovskite structure, space group P-3m (N 164) (a= 5.7996(1){\AA}, c=14.2658(3){\AA}). The structure comprises dimers of face-sharing octahedra as well as octahedra which share only vertices with their neighbours. A long-range antiferromagnetically ordered state has been identified from neutron diffraction and magnetic studies. The magnetic diffraction peaks were registered below the magnetic transition at about 15 K and a possible model for the magnetic structure is proposed. The structural and magnetic features of this compound are discussed and compared with those of other Co-based quaternary oxides adopting the perovskite structure.
Ivanov S. A.
Mathieu Renaud
Nordblad Per
Ritter Clemens
Tellgren R.
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