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 language | English |
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Article number | 097204 |
Journal | Physical Review Letters |
Volume | 101 |
Issue number | 9 |
DOIs | |
Publication status | Published - 2008 Aug 29 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy(all)