Magnetic Excitations and Spin Correlations in Two-Dimensional Percolating Ising Antiferromagnets

Kazuaki Iwasa, Hironobu Ikeda, Ken H. Andersen, Roger S. Eccleston

Research output: Contribution to journalArticlepeer-review

Abstract

The magnetic excitations in two-dimensional percolating Ising-type antiferromagnets, Rb2CocMg1-cF4 (c = 0.60 and 0.70), were studied by pulsed-neutron scattering. The peaks due to Ising-cluster excitations were clearly observed far above TN. Their intensities exist even at 5TN and 2TN for c = 0-60 and 0.70, respectively. This reveals that the characteristic time of the spin correlation in percolating networks is much longer than that of neutrons traveling through the systems, and, therefore, the spins can provide molecular fields at the neighboring sites, even in paramagnetic regions.

Original languageEnglish
Pages (from-to)1038-1042
Number of pages5
Journaljournal of the physical society of japan
Volume65
Issue number4
DOIs
Publication statusPublished - 1996

Keywords

  • Fractal
  • Ising-cluster excitation
  • Neutron scattering
  • Spin correlation
  • Two-dimensional percolating ising antiferromagnet

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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