Conference Presentation (After Call)

FZJ-2026-03337

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Competing ordering modes in the distorted quantum kagome material clinoatacamite Cu$_2$Cl(OH)$_3$

Stödter, L. (Corresponding author)FZJ* ; Kastner, C. ; Jeschke, H. O. ; Reehuis, M. ; Beauvois, K. ; Ouladdiaf, B. ; Chan, E. ; Yokaichiya, F. ; Bert, F. ; Hicken, T. J. ; Krieger, J. A. ; Luetkens, H. ; Allen, J. L. ; Feyerherm, R. ; Tovar, M. ; Menzel, D. ; Wolter, A. U. B. ; Rule, K. C. ; Litterst, F. J. ; Rößler, U. K. ; Süllow, S.

2026

Abstract: Structurally, the mineral clinoatacamite Cu$_2$Cl(OH)$_3$ is closely related to the kagome material herbertsmithite ZnCu$_3$Cl$_2$(OH)$_6$, however, its kagome motif of Cu sites is embedded into a low-symmetry crystal structure. The magnetic ground states of clinoatacamite below an ordering temperature of 18.1 K have remained inconclusive to date. Here, we revisit the magnetic properties using single-crystalline material. We have characterized clinoatacamite by means of thermodynamic measurement techniques, µSR as well as neutron diffraction. We reveal a complex zero-field sequence of phases and discuss our data within a scenario of competing antiferromagnetic ordering modes.

Keyword(s): Magnetic Materials (1st) ; Condensed Matter Physics (2nd) ; Magnetism (2nd)

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Contributing Institute(s):

1. JCNS-4 (JCNS-4)
2. JCNS-3 (JCNS-3)
3. Heinz Maier-Leibnitz Zentrum (MLZ)
4. JCNS-FRM-II (JCNS-FRM-II)

Research Program(s):

1. 6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ) (POF4-6G4) (POF4-6G4)
2. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)

Experiment(s):

1. Measurement at external facility

Appears in the scientific report 2026

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