Berlin 2018 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 52: Poster II
MA 52.57: Poster
Donnerstag, 15. März 2018, 15:00–18:00, Poster C
Synthesis, Structure and Magnetic Properties of the AB3Si2Sn7O16 Phases — •Morgan Allison1,2,3, Siegbert Schmid2, Tilo Söhnel3, Glen Stewart4, Christopher Ling1, and Sabine Wurmehl1 — 1IFW, Dresden, Germany — 2School of Chemistry, The University of Sydney, Sydney, Australia — 3School of Chemistry, The University of Auckland, Auckland, New Zealand — 4School of PEMS, UNSW@ADFA, Canberra, Australia
Layered oxide structures have been reported to exhibit several novel magnetic material properties. Transition metal oxide materials with mixtures of different elements have also been shown to exhibit several useful magnetic behaviours, many of which could be extremely beneficial for future technical devices. Fe4Si2Sn7O16 provides a novel situation in oxide compounds. It can be described as a composite of oxygen linked intermetallic (FeSn6) octahedra and (FeO6)/(SnO6) kagomé-oxide layers within the one structure. SiO4 tetrahedra separate these layers which leads to electronic isolation of the repeated layers by about 7 Å, resulting in a nearly perfectly 2D oxide system. In our investigation, doping experiments across a range of different transition metal chemistries were performed, refinements of the structures from X-ray and neutron powder diffraction patterns were used to determine the crystal structure and distribution of transition metals across both layers. In this presentation the results of different elemental substitution on the crystal and magnetic structures of this family of compounds will be discussed, additionally we will present some of the novel results from the spectroscopic and magnetic characterisation of these materials.