Atacamite Cu2Cl(OH)3: A model compound for the S = 1/2 sawtooth chain?

We present a combined experimental and theoretical study of the mineral atacamite Cu2Cl(OH)3.Based on ab initio band structure calculations, we derive a magnetic coupling scheme of essentially a S = 1/2 sawtooth chain. Experimentally, we fully characterize the long-range antiferromagnetically ordere...

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Detalles Bibliográficos
Autores: Heinze, L., Jeschke, H., Metavitsiadis, A., Reehuis, M., Feyerherm, R., Hoffmann, J. U., Wolter, A. U. B., Ding, X., Zapf, V., Corvalán Moya, Carolina del Huerto, Weickert, F., Jaime, M., Rule, K. C., Menzel, D., Valenti, R., Brenig, W., Süllow, S.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/122636
Acceso en línea:http://hdl.handle.net/11336/122636
Access Level:acceso abierto
Palabra clave:ATACAMITE
HIGH MAGNETIC FIELD
NUMERICAL CALCULATIONS
Cu2Cl(OH)3
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
Descripción
Sumario:We present a combined experimental and theoretical study of the mineral atacamite Cu2Cl(OH)3.Based on ab initio band structure calculations, we derive a magnetic coupling scheme of essentially a S = 1/2 sawtooth chain. Experimentally, we fully characterize the long-range antiferromagnetically ordered state and field-induced behavior, here for H k b axis. Magnetic order is suppressed by magnetic fields of ∼ 20 T, while beginning at 31.5 T we observe a wide magnetization plateau at half of the saturation magnetization, Msat/2. Numerical calculations for the magnetization M(H) of the quantum sawtooth chain reveal a plateau at Msat/2, raising the issue of the understandingof its microscopic nature.

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