Structural and magnetic properties of Mn3−xCdxTeO6 (x=0, 1, 1.5 and 2) |
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Authors: | SA Ivanov R Mathieu P NordbladE Politova R TellgrenC Ritter V Proidakova |
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Institution: | a Department of Inorganic Materials, Karpov' Institute of Physical Chemistry, Vorontsovo pole, 10 105064, Moscow K-64, Russia b Department of Engineering Sciences, Uppsala University, Box 534, SE-751 21 Uppsala, Sweden c Department of Materials Chemistry, Uppsala University, Box 538, SE-751 21 Uppsala, Sweden d Institute Laue Langevin, Grenoble, France |
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Abstract: | Mn3TeO6 exhibits a corundum-related A3TeO6 structure and a complex magnetic structure involving two magnetic orbits for the Mn atoms Ivanov et al., 2011 3]]. Mn3−xCdxTeO6 (x=0, 1, 1.5, and 2) ceramics were synthesized by solid state reaction and investigated using X-ray powder diffraction, electron microscopy, and calorimetric and magnetic measurements. Cd2+ replaces Mn2+ cations without greatly affecting the structure of the compound. The Mn and Cd cations were found to be randomly distributed over the A-site. Magnetization measurements indicated that the samples order antiferromagnetically at low temperature with a transition temperature that decreases with increasing Cd doping. The nuclear and magnetic structure of one specially prepared 114Cd containing sample: Mn1.5114Cd1.5TeO6, was studied using neutron powder diffraction over the temperature range 2-295 K. Mn1.5114Cd1.5TeO6 was found to order in an incommensurate helical magnetic structure, very similar to that of Mn3TeO6 Ivanov et al., 2011 3]]. However, with a lower transition temperature and the extension of the ordered structure confined to order 240(10) Å. |
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Keywords: | Oxides Magnetism Tellurates Magnetic structures Neutron diffraction Multiferroics |
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