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MA: Fachverband Magnetismus

MA 40: Frustrated Magnets II

MA 40.8: Vortrag

Donnerstag, 21. März 2024, 17:00–17:15, H 1058

Magnetic Phase Diagram of Rouaite, Cu2(OH)3NO3 — •Darren C. Peets1, Aswathi Mannathanath Chakkingal1, Anton A. Kulbakov1, Maxim Avdeev2,3, Ramender S. Kumar4, Issei Niwata4, Ellen Häußler5, Roman Gumeniuk6, J. Ross Stewart7, Vladimir Pomjakushin8, Sergey Granovsky1, Yoshihiko Ihara4, and Dmytro S. Inosov11Institut für Festkörper- und Materialphysik, TU Dresden, Dresden, Germany — 2ANSTO, Lucas Heights, NSW, Australia — 3University of Sydney, Sydney, NSW, Australia — 4Hokkaido University, Sapporo, Japan — 5Anorganische Chemie II, TU Dresden, Dresden, Germany — 6Institut für Experimentelle Physik, TU Bergakademie Freiberg, Freiberg, Germany — 7ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Didcot, UK — 8Paul Scherrer Institute, Villigen, Switzerland

Spinon-magnon mixing was recently reported in botallackite Cu2(OH)3Br with a uniaxially compressed triangular lattice of Cu2+ quantum spins. Its nitrate analogue rouaite, Cu2(OH)3(NO3), has a highly analogous structure and might be expected to exhibit similar physics. To lay a foundation for research on this material, we report rouaite’s magnetic phase diagram and identify both low-field phases. The low-temperature magnetic state comprises alternating ferro- and antiferromagnetic chains as in botallackite, but with some additional canting, while the higher-temperature phase is a helical modulation of this, where the spins rotate from one Cu plane to the next.

Keywords: frustrated magnets; magnetic order; magnetic phase diagram; Cu-based minerals; quantum magnetism

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