The evolution of magnetic structure in CaBaCo4-xMxO7 (x ≤ 2; M=Fe, Zn) compounds.
Recently, a new mixed oxide of Co was found with a noncentrosymmetric structure and showing strong magnetoelectric coupling: The new multiferroic CaBaCo4O7. The Co has a tetrahedral coordination and it is located in four non-equivalent crystallographic sites. Two of them are ascribed to Co3+ and the other two to Co2+. This material has been doped using different transition metals. Magnetic properties of the parent compound are strongly modified by doping but the most striking point was the finding of a new magnetic structure for CaBaCo3FeO7. The main objective of this proposal is to precisely determine this new magnetic structure and to find the relationship between the magnetic ground state and the type of substitution in the Co sublattice. In this way, we are going to study the effect of a substitution with both trivalent (Fe3+) and divalent (Zn2+) cations. Moreover, as the differences in the magnetic structure between CaBaCo4O7 and CaBaCo3FeO7 compounds are significant,we will follow the evolution of the magnetic ground state upon increasing the Fe content in the chemical composition.
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BLASCO Javier; CUARTERO Vera; GARCIA RUIZ Joaquin; LAFUERZA SARA; RITTER Clemens; RODRIGUEZ VELAMAZAN Jose Alberto and G. Subías. (2015). The evolution of magnetic structure in CaBaCo4-xMxO7 (x ≤ 2; M=Fe, Zn) compounds.. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2366
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