Ni-chain gap excitations: One-dimensional to three-dimensional crossover

T. Yokoo, A. Zheludev, M. Nakamura, J. Akimitsu

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Linear-chain mixed-spin antiferromagnets ((Formula presented)(Formula presented)(Formula presented)(Formula presented) were investigated by powder inelastic neutron scattering for x=0.25, 0.5, and x=0.75. Long-range magnetic ordering was observed in all samples. The temperature dependence of the Ni-chain spin-gap modes was measured and compared to previous results for the x=0 and x=1 materials. In the magnetically disordered phase the spin dynamics was shown to have a composition-independent character. The results suggest that one-dimensional gap excitations seen in the paramagnetic and Néel phases of (Formula presented)(Formula presented) are inherently related to Haldane spin excitations in the quantum-disordered system (Formula presented)(Formula presented).

Original languageEnglish
Pages (from-to)11516-11520
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume55
Issue number17
DOIs
Publication statusPublished - Jan 1 1997
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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