Abstract
Recently, Q.-P. Ding et al. [Phys. Rev. B 95, 184404 (2017)] reported that their nuclear magnetic resonance (NMR) study on successfully characterized the antiferromagnetic (AFM) propagation vector of the incommensurate helix AFM state, showing that NMR is a unique tool for determination of the spin structures in incommensurate helical AFMs. Motivated by this work, we have carried out , , and NMR measurements on the helical antiferromagnet with an AFM ordering temperature K. An incommensurate helical AFM structure was clearly confirmed by and NMR spectra on single-crystalline in zero magnetic field at 1.6 K and its external magnetic field dependence. Furthermore, based on NMR data in both the paramagnetic and incommensurate AFM states, we have determined the model-independent value of the AFM propagation vector , where is the -axis lattice parameter. The temperature dependence of k is also discussed.
3 More- Received 27 April 2017
- Revised 15 June 2017
DOI:https://doi.org/10.1103/PhysRevB.96.024405
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