A theoretical model for tellurite-sulfates Na${}_2$Cu${}_5$(TeO${}_3$)(SO${}_4$)${}_3$(OH)${}_4$ and K${}_2$Cu${}_5$(TeO${}_3$)(SO${}_4$)${}_3$(OH)${}_4$

Abstract

A theoretical model for two new tellurite-sulfates, namely Na${}_2$Cu${}_5$(TeO${}_3$)(SO${}_4$)${}_3$(OH)${}_4$ and K${}_2$Cu${}_5$(TeO${}_3$)(SO${}_4$)${}_3$ (OH)${}_4$ is determined to be compatible with ab-initio calculations. The results obtained in this work show that some previous speculations in the literature about the couplings are correct, obtaining a model with a mixture of ferromagnetic and antiferromagnetic couplings. We use a combination of numerical techniques to study the magnetic properties of the model. Our numerical calculations based on the density-matrix renormalization group method reveal that the system presents Ising-like magnetization plateaux at rational values of the saturation magnetization.

7 pages, 8 figures

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Cited by in corpus (1)

• Magnetic anisotropy effect on stabilizing magnetization plateaus of kagome strip chain Heisenberg antiferromagnets