Monte Carlo study of half-magnetization plateau and magnetic phase diagram in pyrochlore antiferromagnetic Heisenberg model

Yukitoshi Motome, Karlo Penc, Nic Shannon

Research output: Contribution to journalConference article

33 Citations (Scopus)

Abstract

The antiferromagnetic Heisenberg model on a pyrochlore lattice under external magnetic field is studied by classical Monte Carlo simulation. The model includes bilinear and biquadratic interactions; the latter effectively describes the coupling to lattice distortions. The magnetization process shows a half-magnetization plateau at low temperatures, accompanied with strong suppression of the magnetic susceptibility. Temperature dependence of the plateau behavior is clarified. Finite-temperature phase diagram under the magnetic field is determined. The results are compared with recent experimental results in chromium spinel oxides.

Original languageEnglish
Pages (from-to)57-61
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Volume300
Issue number1
DOIs
Publication statusPublished - May 1 2006
EventThird International Symposium on Magnetism 2005 -
Duration: Jun 26 2005Jun 30 2005

Keywords

  • Bilinear-biquadratic Heisenberg model
  • Geometrical frustration
  • Magnetization plateau
  • Monte Carlo simulation
  • Pyrochlore lattice

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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