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Abstract:
SmFeO3 has attracted considerable attention very recently due to its
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 reveal a clear sign for magneto-elastic coupling at the
Neel-temperature of similar to 675 K, the dielectric measurements remain
silent as far as ferroelectricity is concerned.
