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NMR studies of the incommensurate helical antiferromagnet EuCo2P2: Determination of antiferromagnetic propagation vector

TitleNMR studies of the incommensurate helical antiferromagnet EuCo2P2: Determination of antiferromagnetic propagation vector
Publication TypeJournal Article
Year of Publication2017
AuthorsHiga, N, Ding, QP, Yogi, M, Sangeetha, NS, Hedo, M, Nakama, T, Onuki, Y, Johnston, DC, Furukawa, Y
JournalPhysical Review B
Volume96
Pagination024405
Date Published07
Type of ArticleArticle
ISBN Number2469-9950
Accession NumberWOS:000405021900004
Keywordsphysics, pressure, transition
Abstract

Recently, Q.-P. Ding et al. [Phys. Rev. B 95, 184404 (2017)] reported that their nuclear magnetic resonance (NMR) study on EuCo2As2 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 Eu-153, P-31, and Co-59 NMR measurements on the helical antiferromagnet EuCo2P2 with an AFM ordering temperature T-N = 66.5 K. An incommensurate helical AFM structure was clearly confirmed by 153Eu and (31) PNMR spectra on single-crystalline EuCo2P2 in zero magnetic field at 1.6 K and its external magnetic field dependence. Furthermore, based on 59Co NMR data in both the paramagnetic and incommensurate AFM states, we have determined the model-independent value of the AFM propagation vector k = (0,0,0.73 +/- 0.09)2 pi/c, where c is the c-axis lattice parameter. The temperature dependence of k is also discussed.

DOI10.1103/PhysRevB.96.024405
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Complex States