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Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 13: Frustrated Magnets - General 1 (joint session TT/MA)

MA 13.2: Vortrag

Dienstag, 2. April 2019, 09:45–10:00, Theater

Magnetization plateau in the frustrated quantum sawtooth chain atacamite, Cu2Cl(OH)3 — •Leonie Heinze1, Xiaxin Ding2, Vivien Zapf2, Franziska Weickert2, Marcelo Jaime2, Gaël Bastien3, Anja U.B. Wolter3, Manfred Reehuis4, Jens-Uwe Hoffmann4, Ralf Feyerherm4, Dirk Menzel1, Kirrily C. Rule5, and Stefan Süllow11IPKM, TU Braunschweig, Braunschweig, Germany — 2NHMFL, Los Alamos, USA — 3IFW Dresden, Dresden, Germany — 4HZB, Berlin, Germany — 5ANSTO, Kirrawee, Australia

The frustrated nature of the quantum magnet atacamite, Cu2Cl(OH)3, is displayed by its magnetic properties [1]. Band structure calculations [2] suggest that the magnetic coupling scheme can essentially be understood in terms of a quantum sawtooth chain with a dominant coupling along the chain of about J1 ∼ 100 K, and a secondary coupling about J2 ∼ 30 K.

Here, we present new insights into the magnetic phase diagram of atacamite. We discuss the long-range ordered magnetic ground state below TN = 8.6 K and present high field magnetization data revealing a 1/2-magnetization plateau. Magnetic saturation is estimated to be attained in fields between 75 to 80 T.
L. Heinze, et al., Physica B 536, 377 (2018)
H. O. Jeschke and R. Valentí, private communication.

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