SKM 2023 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 40: Poster Magnetism II

MA 40.25: Poster

Donnerstag, 30. März 2023, 14:00–16:00, P2/EG

Frustrated Low-dimensional Copper Compounds Bluebellite and Rouaite. — •Aswathi Mannathanath Chakkingal¹, Falk Pabst², Vladimir Pomjakushin³, Maxim Avdeev⁴, Roman Gumeniuk⁵, Darren Peets¹, and Dmytro Inosov¹ — ¹IFMP, TU Dresden, Germany — ²Professur f. Anorganische Chemie II, TU Dresden, Germany — ³PSI, Switzerland — ⁴ANSTO, Australia — ⁵Institut für Experimentelle Physik, TU Bergakademie Freiberg, Germany

The hydrothermal technique is an efficient strategy to synthesize mineralogically inspired structures, including natural and synthetic cuprate minerals with a variety of exciting frustrated magnetic lattices. We report the hydrothermal synthesis of bluebellite (Cu6[(IO3)(OH)3](OH)7Cl) and rouaite (Cu2(NO3)(OH)3). Neutron diffraction studies were performed to determine both compound’s crystal structure and magnetic structure. Cu2(NO3)(OH)3 crystallizes in a monoclinic structure consisting of a ferromagnetic chain and an antiferromagnetic chain of Cu²⁺. This is similar to the botallackite (Cu(OH)3Br) in which spinon-magnon mixing was recently reported. Cu6[(IO3)(OH)3](OH)7Cl crystallizes in a trigonal structure, and the magnetic Cu²⁺ forms a distorted maple-leaf lattice. Frustration effects and quantum fluctuations in spin-1/2 maple-leaf lattice antiferromagnets may give rise to interesting phenomena. We report details of the crystal structure, magnetic structure, and the low-temperature magnetic and thermal properties.