Enhanced Ferroelectric Polarization by Induced Dy Spin Order in Multiferroic DyMnO{sub 3}

Journal Article · Fri Feb 02 04:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.98.057206· OSTI ID:20955430

Prokhnenko, O; Landsgesell, S; Aliouane, N; Argyriou, D N ^[1]; Feyerherm, R; Dudzik, E ^[2]; Chapon, L C ^[3]

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1. Hahn-Meitner-Institut, Glienicker Strasse 100, D-14109 Berlin (Germany)
2. Hahn-Meitner-Institut, c/o BESSY, D-12489 Berlin (Germany)
3. ISIS, Rutherford Appleton Laboratory, Chilton, Didcot, OX11, 0QX (United Kingdom)

Neutron powder diffraction and single crystal x-ray resonant magnetic scattering measurements suggest that Dy plays an active role in enhancing the ferroelectric polarization in multiferroic DyMnO{sub 3} above T{sub N}{sup Dy}=6.5 K. We observe the evolution of an incommensurate ordering of Dy moments with the same periodicity as the Mn spiral ordering. It closely tracks the evolution of the ferroelectric polarization. Below T{sub N}{sup Dy}, where Dy spins order commensurately, the polarization decreases to values similar for those of TbMnO{sub 3}. The higher P{sub s} found just above T{sub N}{sup Dy} arises from the contribution of Dy spins so as to effectively increase the amplitude of the Mn spin spiral.

• OSTI ID: 20955430
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 5 Vol. 98; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DYSPROSIUM COMPOUNDS
EVOLUTION
FERROELECTRIC MATERIALS
MANGANESE OXIDES
MONOCRYSTALS
NEUTRON DIFFRACTION
PARTICLE TRACKS
PERIODICITY
POLARIZATION
SPIN