Spin dynamics of triangular lattice antiferromagnet CuFeO2: Crossover from spin-liquid to paramagnetic phase

Kei Hayashi, Tomohiro Nozaki, R. Fukatsu, Yuzuru Miyazaki, T. Kajitani

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

We have investigated the spin dynamics of triangular lattice antiferromagnet CuFeO2 by measuring powder neutron inelastic-scattering spectra. A quasielastic component whose half-width oscillates with the magnitude of the scattering vector appears in the spectra above Néel temperature. A dynamics model representing the shape of quasielastic components and oscillatory behaviors changes from spin jump diffusion to Heisenberg paramagnetic (PM) scattering with increasing temperature. These findings demonstrate that CuFeO2 shows a gradual transition from a spin-liquid phase to the Heisenberg PM phase. The origin of the spin-liquid phase is discussed in terms of incommensurate short-range spin correlation.

Original languageEnglish
Article number144413
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number14
DOIs
Publication statusPublished - 2009 Oct 19

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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