Homogenous reduced moment in a gapful scalar chiral kagome antiferromagnet

Abstract

We present present a quantitative experimental investigation of the scalar chiral magnetic order with in $\mathrm{N}{\mathrm{d}}_3\mathrm{S}{\mathrm{b}}_3\mathrm{M}{\mathrm{g}}_2{\mathrm{O}}_{14}$. 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 $\mathrm{N}{\mathrm{d}}_3\mathrm{S}{\mathrm{b}}_3\mathrm{M}{\mathrm{g}}_2{\mathrm{O}}_{14}$ to Nd pyrochlores and show that it is close to a moment fragmented state.

5 pages, 4 figures, 3 pages supplemental information

References in corpus (4)

• Topological Thermal Hall Effect in Frustrated Kagomé Antiferromagnets
• Structural and Magnetic Investigations of Single-Crystals of the Neodymium Zirconate Pyrochlore, Nd2Zr2O7
• Hidden multipolar orders of dipole-octupole doublets on a triangular lattice
• Muon spin relaxation and inelastic neutron scattering investigations of all-in/all-out antiferromagnet Nd2Hf2O7