TY - JOUR
T1 - Observation of magnetic order in multiferroic SmMn2 O5 studied by resonant x-ray magnetic scattering
AU - Ishii, Y.
AU - Horio, S.
AU - Mitarashi, M.
AU - Sakakura, T.
AU - Fukunaga, M.
AU - Noda, Y.
AU - Honda, T.
AU - Nakao, H.
AU - Murakami, Y.
AU - Kimura, H.
PY - 2016/2/16
Y1 - 2016/2/16
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.93.064415
DO - 10.1103/PhysRevB.93.064415
M3 - Article
AN - SCOPUS:84960157377
VL - 93
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 6
M1 - 064415
ER -