Homogeneous reduced moment in a gapful scalar chiral kagome antiferromagnet

A. Scheie, S. Dasgupta, M. Sanders, A. Sakai, Y. Matsumoto, T. R. Prisk, S. Nakatsuji, R. J. Cava, C. Broholm

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We present a quantitative experimental investigation of the scalar chiral magnetic order with in Nd3Sb3Mg2O14. 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) μB, just 61(2)% of the saturated moment size. The experiments exclude static disorder as the source of the reduced moment. A 38(1)μeV 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 Nd3Sb3Mg2O14 to Nd pyrochlores and show that Nd2Zr2O7 is in a spin fragmented state using nuclear Schottky heat capacity.

Original languageEnglish (US)
Article number024414
JournalPhysical Review B
Issue number2
StatePublished - Jul 12 2019

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Scheie, A., Dasgupta, S., Sanders, M., Sakai, A., Matsumoto, Y., Prisk, T. R., Nakatsuji, S., Cava, R. J., & Broholm, C. (2019). Homogeneous reduced moment in a gapful scalar chiral kagome antiferromagnet. Physical Review B, 100(2), [024414]. https://doi.org/10.1103/PhysRevB.100.024414