Magnetic ground state of Kagome-stripe lattice Na<sub>2</sub>Co<sub>3</sub>(VO<sub>4</sub>)<sub>2</sub>(OH)<sub>2</sub> and K<sub>2</sub>Mn<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>(OH)<sub>2</sub>

ORAL

Abstract

Kagome stripe lattice is a one-dimensional variation of the kagome lattice. It combines the geometric frustration of the triangular motif and the quantum fluctuation of the magnetic 1-D chain, giving rise to novel magnetic ground states. Here, we report the magnetization and neutron diffraction study of the kagome-stripe lattice materials Na2Co3(VO4)2(OH)2 and K2Mn3(AsO4)2(OH)2. In both cases, non-collinear antiferromagnetic ground states are found. Na2Co3(VO4)2(OH)2 shows reduced ordered moment on Co2+ one-dimensional chains because of magnetic frustration. K2Mn3(AsO4)2(OH)2 shows a crossover between 2-D and 3-D magnetic orders because of the weak inter-layer correlation. We discuss the origin of these non-collinear magnetic ground states in terms of magnetic interaction and spin anisotropy and compare the quantum and classical behaviors in the two iso-structural materials.

**The research was supported by the U.S. Department of Energy (DOE), Early Career Research Program Award KC0402020 and used resources at the High Flux Isotope Reactor and the Spallation Neutron Source, DOE Office of Science User Facilities operated by ORNL.

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Presenters

  • Yiqing Hao

    • Oak Ridge National Laboratory

Authors

  • Yiqing Hao

    • Oak Ridge National Laboratory

  • Megan Smart

    • Aarhus university

  • Jie Xing

    • Oak Ridge National Laboratory

  • Duminda D Liurukara

    • Oak Ridge National Laboratory

  • Huibo Cao

    • Oak Ridge National Laboratory