Observation of magnetic order in multiferroic SmMn2 O5 studied by resonant x-ray magnetic scattering

Y. Ishii, S. Horio, M. Mitarashi, T. Sakakura, M. Fukunaga, Y. Noda, T. Honda, H. Nakao, Y. Murakami, H. Kimura

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Abstract

We report a resonant x-ray magnetic scattering study of multiferroic SmMn2O5, for which the microscopic magnetic properties have not yet been revealed. Dielectric measurements indicated that ferroelectric phase transitions occur around TC1≃34 K and TC2≃28 K. Resonant x-ray magnetic scattering was observed at both the Sm LIII and Mn K edges in the ferroelectric phase below TC2. The Sm and Mn magnetic moments align antiferromagnetically with a magnetic propagation wave vector qM=(1/2,0,0), and the ferroelectric transition coincides with the antiferromagnetic transition. The azimuthal dependence of the resonant magnetic signals confirmed that the Sm and Mn magnetic moments have a dominant c-axis component, which is quite unique because Mn moments have a dominant a-axis component in other RMn2O5 (R=rare earth,Y,Bi) compounds. We propose a magnetic structure with the magnetic space group P2ab21m, which allows electric polarization along the b axis in the ferroelectric phase.

Original languageEnglish
Article number064415
JournalPhysical Review B
Volume93
Issue number6
DOIs
Publication statusPublished - Feb 16 2016

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Ishii, Y., Horio, S., Mitarashi, M., Sakakura, T., Fukunaga, M., Noda, Y., Honda, T., Nakao, H., Murakami, Y., & Kimura, H. (2016). Observation of magnetic order in multiferroic SmMn2 O5 studied by resonant x-ray magnetic scattering. Physical Review B, 93(6), [064415]. https://doi.org/10.1103/PhysRevB.93.064415