TY  - CONF
AU  - Heinze, Leonie
AU  - Kastner, C.
AU  - Jeschke, H. O.
AU  - Reehuis, M.
AU  - Beauvois, K.
AU  - Ouladdiaf, B.
AU  - Yokaichiya, F.
AU  - Bert, F.
AU  - Hicken, T. J.
AU  - Krieger, J. A.
AU  - Luetkens, H.
AU  - Allen, J. L.
AU  - Feyerherm, R.
AU  - Menzel, D.
AU  - Wolter, A. U. B.
AU  - Rule, K. C.
AU  - Litterst, F. J.
AU  - Rößler, U. K.
AU  - Süllow, S.
TI  - Magnetism of the distorted kagome material clinoatacamite Cu$_2$Cl(OH)$_3$
M1  - FZJ-2025-04563
PY  - 2025
AB  - Structurally, the mineral clinoatacamite Cu$_2$Cl(OH)$_3$ is closely related to the kagome material herbertsmithite Zn$_3$CuCl$_2$(OH)$_6$. In clinoatacamite, however, the kagome motif of Cu sites is embedded into a low-symmetry crystal structure, which causes a distortion of the kagome plane as well as different site symmetries for the kagome Cu sites. Unlike the quantum spin liquid candidate herbertsmithite, clinoatacamite undergoes a magnetic transition at 18.1 K. Its magnetic ground states have remained inconclusive to date. Here, we will revisit the magnetic properties using single-crystalline material. We will first demonstrate using density-functional theory that the dominant magnetic exchange couplings in this material form non-uniform antiferromagnetic kagome layers of Cu sites with weak ferromagnetic couplings to the interlayer Cu site. Further, we have characterized clinoatacamite by means of thermodynamic measurement techniques, muon spin rotation/relaxation as well as neutron diffraction. We reveal a zero-field magnetic phase diagram which is far more complex than previously anticipated. We discuss our data within a scenario of competing order parameters on the inequivalent Cu sites.
T2  - Munich Quantum Matter Days
CY  - 27 Oct 2025 - 31 Oct 2025, Munich (Germany)
Y2  - 27 Oct 2025 - 31 Oct 2025
M2  - Munich, Germany
LB  - PUB:(DE-HGF)24
UR  - https://juser.fz-juelich.de/record/1048341
ER  -