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-In-person

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.

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Presenters

  • Yiqing Hao

    • Oak Ridge National Laboratory

Authors

  • Yiqing Hao

    • Oak Ridge National Laboratory

  • Megan Smart

  • Jie Xing

    • Oak Ridge National Laboratory

  • Liurukara Sanjeewa

  • Huibo Cao

    • Oak Ridge National Laboratory