Scalar Chiral Spin-1/2 Order on Kagome Lattices in Nd3Sb3Mg2O14

Abstract

We introduce $\mathrm{N}{\mathrm{d}}_3\mathrm{S}{\mathrm{b}}_3\mathrm{M}{\mathrm{g}}_2{\mathrm{O}}_{14}$ with ideal kagome lattices of neodymium ions in ABC stacking. Thermodynamic measurements show a Curie-Weiss temperature of ${\Theta }_{CW}=-0.12$K, a Nd${}^{3+}$ spin-1/2 Kramers doublet ground state, and a second order phase transition at $T_N=0.56(2)$K. Neutron scattering reveals non-coplanar scalar chiral $\mathbf{k}=0$ magnetic order with a correlation length exceeding 400 Å= 55 $a$ and an ordered moment of $1.79(5){\mu }_B$. This order includes a canted ferromagnetic component perpendicular to the kagome planes favored by Dzyaloshinskii-Moriya interactions.

arXiv comment5 pages, 4 figures

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