%0 Conference Paper
%A Heinze, Leonie
%A Kastner, C.
%A Jeschke, H. O.
%A Reehuis, M.
%A Beauvois, K.
%A Ouladdiaf, B.
%A Yokaichiya, F.
%A Bert, F.
%A Hicken, T. J.
%A Krieger, J. A.
%A Luetkens, H.
%A Allen, J. L.
%A Feyerherm, R.
%A Menzel, D.
%A Wolter, A. U. B.
%A Rule, K. C.
%A Litterst, F. J.
%A Rößler, U. K.
%A Süllow, S.
%T Magnetism of the distorted kagome material clinoatacamite Cu$_2$Cl(OH)$_3$
%M FZJ-2025-04563
%D 2025
%X 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.
%B Munich Quantum Matter Days
%C 27 Oct 2025 - 31 Oct 2025, Munich (Germany)
Y2 27 Oct 2025 - 31 Oct 2025
M2 Munich, Germany
%F PUB:(DE-HGF)24
%9 Poster
%U https://juser.fz-juelich.de/record/1048341