Spin Dynamics in an Ising-Like Quantum Spin Chain with Nonmagnetic Impurities

Shinichi Itoh, Hironobu Ikeda, Daisuke Sugimoto, Kazuaki Iwasa, Roger S. Eccleston

Research output: Contribution to journalArticlepeer-review

Abstract

Neutron inelastic-scattering experiments on an Ising-like quantum antiferromagnetic chain with nonmagnetic impurities, CsCocMg1−cCl3 (c=1, 0.95, 0.9, 0.85, 0.6 and 0.4), were performed. The concentration dependence of the spin dynamics showed that although the solitons and the spin-wave continuum state were stable for a small amount of nonmagnetic impurities, they vanished at c=0.8. We also observed the coexistence of Ising-cluster excitations and intra-cluster excitations at low temperatures. These results can be well interpreted by a theory incorporated with next-nearest-neighbor interactions in the chain.

Original languageEnglish
Pages (from-to)927-933
Number of pages7
Journaljournal of the physical society of japan
Volume64
Issue number3
DOIs
Publication statusPublished - 1995 Mar

Keywords

  • CsCoMgCl
  • Ising-like antiferromagnetic chain
  • exchange interaction
  • inelastic neutron scattering
  • nonmagnetic impurity
  • spin dynamics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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