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

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

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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 understanding of its microscopic nature.

Original languageEnglish
JournalUnknown Journal
Publication statusPublished - Apr 16 2019

ASJC Scopus subject areas

  • General

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