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Magnetization process of atacamite: a case of weakly coupled $S = 1/2$ sawtooth chains by Heinze, L.; Jeschke, H. O.; Mazin, I. I.; Metavitsiadis, A.; Reehuis, M.; Feyerherm, R.; Hoffmann, J. -U.; Bartkowiak, M.; Prokhnenko, O.; Wolter, A. U. B.; Ding, X.; Zapf, V. S.; Moya, C. Corvalán; Weickert, F.; Jaime, M.; Rule, K. C.; Menzel, D.; Valentí, R.; Brenig, W.; Süllow, S. is a scholarly article available to read on EtoBox.

What is Magnetization process of atacamite: a case of weakly coupled $S = 1/2$ sawtooth chains about?

We present a combined experimental and theoretical study of the mineral atacamite Cu$_2$Cl(OH)$_3$. Density functional theory yields a Hamiltonian describing anisotropic sawtooth chains with weak 3D connections. Experimentally, we fully characterize the antiferromagnetically ordered state. Magnetic order shows a complex evolution with the magnetic field, while, starting at 31.5 T, we observe a plateau-like magnetization at about $M_{\rm sat}/2$. Based on complementary theoretical approaches, we show that the latter is unrelated to the known magnetization plateau of a sawtooth chain. Instead, we provide evidence that the magnetization process in atacamite is a field-driven canting of a 3D network of weakly coupled sawtooth chains that form giant moments.

Author

Heinze, L.; Jeschke, H. O.; Mazin, I. I.; Metavitsiadis, A.; Reehuis, M.; Feyerherm, R.; Hoffmann, J. -U.; Bartkowiak, M.; Prokhnenko, O.; Wolter, A. U. B.; Ding, X.; Zapf, V. S.; Moya, C. Corvalán; Weickert, F.; Jaime, M.; Rule, K. C.; Menzel, D.; Valentí, R.; Brenig, W.; Süllow, S.

Published

2019

Language

EN