# Homogenous reduced moment in a gapful scalar chiral kagome antiferromagnet

## TL;DR

This study investigates the scalar chiral magnetic order in Nd3Sb3Mg2O14, revealing a reduced local magnetic moment and a possible multipolar origin, indicating proximity to a moment fragmented state.

## Contribution

It provides the first quantitative experimental analysis of scalar chiral order and reduced moments in this kagome antiferromagnet, highlighting its closeness to a moment fragmented state.

## Key findings

- Local ordered moment of 1.76 μB, 61% of saturation
- Presence of a 38 μeV gap in magnetic excitation spectrum
- Exclusion of static disorder as cause of moment reduction

## Abstract

We present present a quantitative experimental investigation of the scalar chiral magnetic order with in $\rm{Nd_3Sb_3Mg_2O_{14}}$. Static magnetization reveals a net ferromagnetic ground state, and inelastic neutron scattering from the hyperfine coupled nuclear spin reveals a local ordered moment of 1.76(6) $\mu_B$, just 61(2)% of the saturated moment size. The experiments exclude static disorder as the source of the reduced moment. A 38(1) $\mu$eV gap in the magnetic excitation spectrum inferred from heat capacity rules out thermal fluctuations and suggests a multipolar explanation for the moment reduction. We compare $\rm{Nd_3Sb_3Mg_2O_{14}}$ to Nd pyrochlores and show that it is close to a moment fragmented state.