Homogeneous Reduced Moment in a Gapful Scalar Chiral Kagome Antiferromagnet

Published

July 12, 2019

Author(s)

A. Scheie, S. Dasgupta, M. Sanders, A. Sakai, Y. Matsumoto, Timothy R Prisk, S. Nakatsuji, R. J. Cava, Collin L. Broholm

Abstract

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) υB, just 61(2)% of the saturated moment size. The experiments exclude static disorder as the source of the reduced moment. A 38(1) υeV 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.

Citation

Physical Review B

Volume

100

Issue

2

Pub Type

Journals

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Citation

Scheie, A. , Dasgupta, S. , Sanders, M. , Sakai, A. , Matsumoto, Y. , Prisk, T. , Nakatsuji, S. , Cava, R. and Broholm, C. (2019), Homogeneous Reduced Moment in a Gapful Scalar Chiral Kagome Antiferromagnet, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=927977 (Accessed April 25, 2024)