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oai:figshare.com:article/33914986 2026-09-17T22:03:50Z portal_1197 item_type_3 month_year_09_2026

Data for Single-ion anisotropy driven chiral magnetic order in a spin-1 antiferromagnetic chain S. Vaidya (25015027) S. P. M. Curley (25009771) P. Manuel (6622088) J. Ross Stewart (24885961) M. Duc Le (25023175) A. Hernández-Melián (25022413) T. J. Hicken (24909523) C. Wang (543491) H. Luetkens (7171265) J. Krieger (20202147) S. J. Blundell (2511079) T. Lancaster (2511082) K. A. Wheeler (25025017) D.Y. Villa (25065478) J. L. Manson (2472649) J. Singleton (2953443) R.D. Johnson (25065481) Paul Goddard (564595) Migrated from ePrints Chirality in magnetic systems gives rise to a wide range of exotic phenomena, yet its influence in S = 1 chains remains largely unexplored. Herein, we present a comprehensive experimental study of a chiral antiferromagnetic S = 1 chain, [Ni(pym)(H2O)4]SO4· H2O (pym = pyrimidine), where the Ni(II) octahedral orientation exhibits a four-fold chiral periodicity. Muon spin rotation measurements indicate the onset of long-range magnetic order below TN = 1.82(2) K. Neutron diffraction measurements reveal a chiral antiferromagnetic order driven by a chiral modulation of the easy axis anisotropy direction, rather than the typical scenario of Dzyaloshinskii-Moriya interactions, geometrical frustration or higher-order interactions. Inelastic neutron scattering measurements reveal dispersive spin-wave excitations well described by linear spin-wave theory, with Hamiltonian parameters J0 = 6.81(1) K (intrachain exchange), J′1a = −0.09(1) K (interchain exchange), and D = −3.02(1) K (easy-axis single-ion anisotropy). These parameters are further validated by Monte Carlo simulations of the magnetisation. Additionally, the inelastic neutron scattering data reveal multiple dispersionless bands, suggesting the presence of further excitations beyond the scope of our linear spin-wave theory.<br><br>Data accompanying "Single-ion anisotropy driven chiral magnetism in a Spin-1 antiferromagnetic chain" Phys. Rev. B, S. Vaidya et al, 2026 Data exported from each of the figures presenting data in the paper and supplemental material. 2026-09-17T22:03:50Z Dataset Dataset 10.82444/warw.33914986.v1 https://figshare.com/articles/dataset/Data_for_Single-ion_anisotropy_driven_chiral_magnetic_order_in_a_spin-1_antiferromagnetic_chain/33914986 CC BY 4.0