Regensburg 2025 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 9: Correlated Magnetism – Low-Dimensional Systems
TT 9.2: Vortrag
Montag, 17. März 2025, 15:15–15:30, H33
µSR-investigation of clinoatacamite Cu2Cl(OH)3 — •Carolin Kastner1, Fabrice Bert2, Thomas J. Hicken3, Jonas A. Krieger3, Hubertus Luetkens3, Aaron Schulze1, Dirk Menzel1, F. Jochen Litterst1, Leonie Heinze4, Kirrily C. Rule5, Anja U. B. Wolter6, and Stefan Süllow1 — 1IPKM, TU Braunschweig, Braunschweig, Germany — 2SQM, Université Paris-Saclay, Orsay, France — 3PSI, Villigen, Switzerland — 4FZ Jülich GmbH, JCNS at MLZ, Garching, Germany — 5ANSTO, Kirrawee, Australia — 6IFW Dresden, Dresden, Germany
Interest in the natural mineral clinoatacamite Cu2Cl(OH)3 arose due to its chemical and structural relationship to herbertsmithite, a candidate material featuring a quantum spin liquid state on the kagome lattice. In clinoatacamite, the Cu2+ spins form a system of distorted kagome layers with three inequivalent antiferromagnetic in-plane couplings and weaker ferromagnetic interlayer exchange. This gives rise to a complex magnetic phase diagram which contains a sequence of magnetic transitions of unknown symmetry.
Here, we present a study of the magnetic phase diagram of single-crystalline clinoatacamite using muon spin spectroscopy (µSR) to gain insight into the microscopic details of the different magnetic phases. For our investigation, the natural, single-crystalline samples were extensively pre-characterized by magnetization and specific heat. We will discuss our findings in the context of the local site symmetry of the different Cu ions.
Keywords: muon spin spectroscopy (muSR); kagome lattice; frustrated magnetism; natural mineral; magnetic phase diagram