Competing magnetic anisotropy fields and double polarization flops in multiferroic mn1-xCoxWO4

Young Sang Song, Jae Ho Chung, Sae Hwan Chun, Kee Hoon Kim, Jürg Schefer

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We report the cobalt doping dependencies of the ferroelectric polarization and underlying incommensurate spiral magnetic ordering in multiferroic Mn 1-xCoxWO4 (0 ≤ x < 0:18). The spiral ordering changed its rotational plane upon cobalt doping (x ~ 0:1), followed by heliconical ordering at higher doping (x > 0:15). These consecutive changes were accompanied by simultaneous 90° flops of ferroelectric polarizations. Such doping dependencies are driven by the competitions between the anisotropy fields of MnWO4 and CoWO4, the spatial distributions of which are nearly orthogonal to each other. We propose a model that can consistently describe the two consecutive flops based on a combined picture of magnetic anisotropy and biquadratic exchange.

Original languageEnglish
Article number124716
JournalJournal of the Physical Society of Japan
Volume82
Issue number12
DOIs
Publication statusPublished - 2013 Dec

Keywords

  • Incommensurate antiferromagnet
  • Magnetic anisotropy
  • Multiferroics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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