Two-dimensional quantum universality in the spin-1/2 triangular-lattice quantum antiferromagnet Na₂BaCo(PO₄)₂.

ABSTRACT: An interplay of geometrical frustration and strong quantum fluctuations in a spin-1/2 triangular-lattice antiferromagnet (TAF) can lead to exotic quantum states. Here, we report the neutron-scattering, magnetization, specific heat, and magnetocaloric studies of the recently discovered spin-1/2 TAF Na₂BaCo(PO₄)₂, which can be described by a spin-1/2 easy axis XXZ model. The zero-field neutron diffraction experiment reveals an incommensurate antiferromagnetic ground state with a significantly reduced ordered moment of about 0.54(2) μ_B/Co. Different magnetic phase diagrams with magnetic fields in the ab plane and along the easy c-axis were extracted based on the magnetic susceptibility, specific heat, and elastic neutron-

SUBMITTER: Sheng J 

PROVIDER: S-EPMC9907114 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature