Exchange interaction via crystal-field excited states and its importance in CsCoCl3

Hiroyuki Shiba, Yoshifumi Ueda, Kouichi Okunishi, Shojiro Kimura, Koichi Kindo

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

The low-energy effective Hamiltonian is derived for a typical quasi-one-dimensional Ising-like antiferromagnet CsCoCl3. In contrast to previous treatments, in which only the processes within the crystal-field ground Kramers doublet are considered, second-order processes via crystal-field excited states are also taken into account in the present paper. They result in a new term, which is essentially a next-nearest neighbor ferromagnetic exchange whose anisotropy is different from the nearest-neighbor exchange. By including the new term the magnetization curve and ESR in CsCoCl3 are analyzed to show that those experiments can be explained in a way consistent with other experiments. Related theories on CsCoCl3 are discussed in this connection.

Original languageEnglish
Pages (from-to)2326-2333
Number of pages8
Journaljournal of the physical society of japan
Volume72
Issue number9
DOIs
Publication statusPublished - 2003 Sep 1
Externally publishedYes

Keywords

  • Crystal-field levels
  • CsCoCl
  • Density-matrix renormalization group method
  • Effective hamiltonian
  • One-dimensional quantum magnet

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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