Magnetic ordering, spin waves, and Haldane gap excitations in (Nd_x Y_{1-x})_2 Ba Ni O_5 linear-chain mixed-spin antiferromagnets

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dc.creatorYokoo, T.
dc.creatorRaymond, S.
dc.creatorZheludev, A.
dc.creatorMaslov, S.
dc.creatorRessouche, E.
dc.creatorZaliznyak, I.
dc.creatorErwin, R.
dc.creatorNakamura, M.
dc.creatorAkimitsu, J.
dc.date1997-10-01
dc.date1998-03-09
dc.date.accessioned2026-07-07T12:16:41Z
dc.date.available2026-07-07T12:16:41Z
dc.descriptionLinear-chain nickelates with the composition (Nd_x Y_{1-x})_2 Ba Ni O_5 (x=1, x=0.75, x=0.5, and x=0.25) are studied in a series of neutron scattering experiments. Powder diffraction is used to determine the temperature dependence of the magnetic structure in all four systems. Single-crystal inelastic neutron scattering is employed to investigate the temperature dependence of the Haldane-gap excitations and low-energy spin waves in the x=1 compound Nd_2 Ba Ni O_5. The results of these experiments are discussed in the context of the ``Haldane chain in a staggered field'' model for R_2 Ba Ni O_5 systems, and quantitative agreement with theory is obtained.
dc.descriptionMajor rewriting and inclusion of new experimental data 30 pages, 14 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/9710015
dc.identifierhttp://arxiv.org/abs/cond-mat/9710015
dc.identifierPhys.Rev.B58:14424-14435,1998
dc.identifierdoi:10.1103/PhysRevB.58.14424
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/211881
dc.subjectStrongly Correlated Electrons
dc.subjectMaterials Science
dc.titleMagnetic ordering, spin waves, and Haldane gap excitations in (Nd_x Y_{1-x})_2 Ba Ni O_5 linear-chain mixed-spin antiferromagnets
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