Theoretical model for the magnetic structure of the tellurite sulfates Na2Cu5(TeO3)(SO4)3(OH)4 and K2Cu5(TeO3)(SO4)3(OH)4

BARTOLOMÉ, I. L.; ERRICO, L.; FERNANDEZ, V. I.; MATERA, J. M.; GIL REBAZA, A.V.; C. A LAMAS

PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS

AMER PHYSICAL SOC

Lugar: Nueva York; Año: 2022 vol. 106 p. 195119 - 195119

0163-1829

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.