Magnetization Process of Atacamite: A Case of Weakly Coupled S=1/2 Sawtooth Chains
| Autor: | Harald Olaf Jeschke, Oleksandr Prokhnenko, Kirrily C. Rule, C. Corvalán Moya, Stefan Süllow, Vivien Zapf, Igor Mazin, Alexandros Metavitsiadis, Dirk Menzel, Xiangdong Ding, J.-U. Hoffmann, Franziska Weickert, M. Bartkowiak, Wolfram Brenig, Marcelo Jaime, Anja U. B. Wolter, L. Heinze, Ralf Feyerherm, Manfred Reehuis, Roser Valentí |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Condensed matter physics General Physics and Astronomy State (functional analysis) Sawtooth wave engineering.material 01 natural sciences Magnetic field Magnetization symbols.namesake Chain (algebraic topology) 0103 physical sciences symbols engineering Atacamite 010306 general physics Hamiltonian (quantum mechanics) Anisotropy |
| Zdroj: | Physical Review Letters. 126 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.126.207201 |
| Popis: | We present a combined experimental and theoretical study of the mineral atacamite ${\mathrm{Cu}}_{2}\mathrm{Cl}(\mathrm{OH}{)}_{3}$. 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 plateaulike magnetization at about ${M}_{\mathrm{sat}}/2$. 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. |
| Databáze: | OpenAIRE |
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