Scientific Reports (Feb 2018)

Magnetism of coupled spin tetrahedra in ilinskite-type KCu5O2(SeO3)2Cl3

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

DOI
https://doi.org/10.1038/s41598-018-20350-z
Journal volume & issue
Vol. 8, no. 1
pp. 1 – 10

Abstract

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Abstract Synthesis, thermodynamic properties, and microscopic magnetic model of ilinskite-type KCu5O2(SeO3)2Cl3 built by corner-sharing Cu4 tetrahedra are reported, and relevant magnetostructural correlations are discussed. Quasi-one-dimensional magnetic behavior with the short-range order around 50 K is rationalized in terms of weakly coupled spin ladders (tubes) having a complex topology formed upon fragmentation of the tetrahedral network. This fragmentation is rooted in the non-trivial effect of the SeO3 groups that render the Cu–O–Cu superexchange strongly ferromagnetic even at bridging angles exceeding 110°.