Cycloidal spin order in the a-axis polarized ferroelectric phase of orthorhombic perovskite manganite

Y. Yamasaki, H. Sagayama, N. Abe, T. Arima, K. Sasai, M. Matsuura, K. Hirota, D. Okuyama, Y. Noda, Y. Tokura

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67 Citations (Scopus)

Abstract

The ferroelectric state in an orthorhombic perovskite RMnO3 (R=Gd0.7Tb0.3) was proved by neutron scattering studies to show the cycloidal spin state with the ab-spiral plane and the spin-helicity dependent polarization vector along the a axis, sharing the microscopic origin (inverse Dzyaloshinskii-Moriya interaction) with the more widely observed P||c state (e.g., for R=Tb and Dy) with the bc-spiral plane. The magnetic-field induced polarization flop from P||c to P||a as well known for RMnO3 is thus assigned to the orthogonal flop of the spin spiral plane from bc to ab.

Original languageEnglish
Article number097204
JournalPhysical Review Letters
Volume101
Issue number9
DOIs
Publication statusPublished - 2008 Aug 29
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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