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      Homogenous reduced moment in a gapful scalar chiral kagome antiferromagnet

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          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 \(\rm Nd_2Zr_2O_7\) is in a spin fragmented state using nuclear Schottky heat capacity.

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          Hyperfine Interactions in Rare‐Earth Metals

          B. Bleaney (1963)
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            Author and article information

            Journal
            26 April 2019
            Article
            1904.11779
            a8e9b36e-598c-4dc4-a843-3ceda377343d

            http://arxiv.org/licenses/nonexclusive-distrib/1.0/

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            Custom metadata
            5 pages, 4 figures, 3 pages supplemental information
            cond-mat.str-el

            Condensed matter
            Condensed matter

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