Dresden 2026 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 23: Correlated Electrons – Poster I
TT 23.1: Poster
Monday, March 9, 2026, 18:00–20:00, P1
High-field magnetization of clinoatacamite Cu2Cl(OH)3 — •David Röll1, Leonie Stödter2, Carolin Kastner1, Sven Luther3, Ralf Feyerherm4, Dirk Menzel1, Anja U. B. Wolter5, Kirrily Rule6, and Stefan Süllow1 — 1IPKM, TU Braunschweig — 2FZ Jülich, JCNS at MLZ, Garching, Germany — 3HLD-EMFL, HZDR, Dresden-Rossendorf, Germany — 4HZB, Berlin, Germany — 5Leibniz IFW Dresden, Dresden, Germany — 6ANSTO, Lucas Heights, Australia
The mineral clinoatacamite Cu2Cl(OH)3 is closely related to the Kagome material herbertsmithite ZnCu3Cl2(OH)6 and has been discussed as a geometrically frustrated magnet. Its Kagome structure of Cu2+ ions features antiferromagnetic in-plane coupling and weaker ferromagnetic interlayer exchange, giving rise to exotic quantum states at low temperatures and in applied magnetic fields. In recent years, we have extensively characterized the magnetic phase diagram up to 14 T, revealing multiple distinct magnetic phases.
Here, we present high-field magnetization measurements on a single-crystalline sample up to 52 T. The magnetization at 2.2 K increases with field but begins to saturate at about 15 T, reaching only a fraction of full magnetization and indicating that the system is not fully magnetized. This stands in clear contrast to previously published results, where the mineral is reported to be fully magnetized at around 35 T. Consequently, we expect the magnetization to rise again at fields beyond our current range, implying the possible presence of a magnetization plateau.
Keywords: frustration; kagome; quantum magnetism; magnetization plateau