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Extending the Family of V4+ S=${{ 1/2 }}$ Kagome Antiferromagnets
Authors:Dr Lucy Clark  Dr Farida H Aidoudi  Dr Cameron Black  Dr Kasun S A Arachchige  Prof?Dr Alexandra M Z Slawin  Prof?Dr Russell E Morris  Prof?Dr Philip Lightfoot
Institution:School of Chemistry and EaStChem, University of St Andrews, St Andrews, Fife, KY16 9ST (UK)
Abstract:The ionothermal synthesis, structure, and magnetic susceptibility of a novel inorganic–organic hybrid material, imidazolium vanadium(III,IV) oxyfluoride C3H5N2]V9O6F24(H2O)2] (ImVOF) are presented. The structure consists of inorganic vanadium oxyfluoride slabs with kagome layers of V4+ S=${{ 1/2 }}$equation image ions separated by a mixed valence layer. These inorganic slabs are intercalated with imidazolium cations. Quinuclidinium (Q) and pyrazinium (Pyz) cations can also be incorporated into the hybrid structure type to give QVOF and PyzVOF analogues, respectively. The highly frustrated topology of the inorganic slabs, along with the quantum nature of the magnetism associated with V4+, means that these materials are excellent candidates to host exotic magnetic ground states, such as the highly sought quantum spin liquid. Magnetic susceptibility measurements of all samples suggest an absence of conventional long‐range magnetic order down to 2 K despite considerable antiferromagnetic exchange.
Keywords:crystal growth  fluorides  magnetic properties  vanadium  X‐ray diffraction
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