Roles of bond alternation in magnetic phase diagram of RMnO3

Nobuo Furukawa, Masahito Mochizuki

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In order to investigate the nature of the antiferromagnetic structures in perovskite RMnO3, we study a Heisenberg J1-J2 model with bond alternation using analytical and numerical approaches. The magnetic phase diagram which includes incommensurate spiral states and commensurate collinear states is reproduced. We discuss that the magnetic structure with spin ↑↑↓↓configuration (E-type structure) and the ferroelectricity emerge cooperatively to stabilize this phase. Magnetoelastic couplings are crucial to understand the magnetic and electric phase diagram of RMnO3.

Original languageEnglish
Article number033708
Journaljournal of the physical society of japan
Volume79
Issue number3
DOIs
Publication statusPublished - 2010 Mar 1
Externally publishedYes

Keywords

  • A-type structure
  • Bond alternation
  • E-type structure
  • Heisenberg model
  • Multiferroics
  • RMnO
  • Spin spiral state

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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