k=0 magnetic structure and absence of ferroelectricity in SmFeO3

Abstract

SmFeO3 has attracted considerable attention very recently due to the reported multiferroic properties above room-temperature. We have performed powder and single crystal neutron diffraction as well as complementary polarization dependent soft X-ray absorption spectroscopy measurements on floating-zone grown SmFeO3 single crystals in order to determine its magnetic structure. We found a k=0 G-type collinear antiferromagnetic structure that is not compatible with inverse Dzyaloshinskii-Moriya interaction driven ferroelectricity. While the structural data reveals a clear sign for magneto-elastic coupling at the Néel-temperature of ~675 K, the dielectric measurements remain silent as far as ferroelectricity is concerned.

References in corpus (2)

• Neutron diffraction study of TbMnO3: Magnetic structure revisited
• Negative magnetostrictive magnetoelectric coupling of BiFeO3

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