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arXiv · 1710.04140

Magnetism of coupled spin tetrahedra in ilinskite-type KCu$_{5}$O$_2$(SeO$_3$)$_2$Cl$_3$

Danis I. Badrtdinov·Elena S. Kuznetsova·Valeriy Yu. Verchenko·Peter S. Berdonosov·Valeriy A. Dolgikh·Vladimir V. Mazurenko·Alexander A. Tsirlin
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Abstract

Synthesis, thermodynamic properties, and microscopic magnetic model of ilinskite-type KCu$_{5}$O$_2$(SeO$_3$)$_2$Cl$_3$ built by corner-sharing Cu$_4$ tetrahedra are reported, and relevant magnetostructural correlations are discussed. Quasi-one-dimensional magnetic behavior with the short-range order around 50\,K and the absence of long-range order down to at least 2\,K is observed experimentally and explained in terms of weakly coupled spin ladders (tubes) with a complex topology formed upon fragmentation of the tetrahedral network. This fragmentation is rooted in the non-trivial effect of the SeO$_3$ groups that render the Cu--O--Cu superexchange strongly ferromagnetic.

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Danis I. Badrtdinov, Elena S. Kuznetsova, Valeriy Yu. Verchenko, Peter S. Berdonosov, Valeriy A. Dolgikh, Vladimir V. Mazurenko, Alexander A. Tsirlin. 2017-10-11. Magnetism of coupled spin tetrahedra in ilinskite-type KCu$_{5}$O$_2$(SeO$_3$)$_2$Cl$_3$. https://doi.org/10.1038/s41598-018-20350-z

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