title: k=0 magnetic structure and absence of ferroelectricity in SmFeO3.
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 Néel-temperature of ∼675  K, the dielectric measurements remain silent as far as ferroelectricity is concerned.
authors.affiliation: Max-Planck-Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany.
authors.forename: C-Y
authors.initials: CY
authors.lastname: Kuo
authors.affiliation: Max-Planck-Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany.
authors.forename: Y
authors.initials: Y
authors.lastname: Drees
authors.affiliation: Institut Laue-Langevin, 38042 Grenoble, France.
authors.forename: M T
authors.initials: MT
authors.lastname: Fernández-Díaz
authors.affiliation: Institute of Physics, Academia Sinica, Taipei 11529, Taiwan.
authors.forename: L
authors.initials: L
authors.lastname: Zhao
authors.affiliation: Max-Planck-Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany and Lviv Polytechnic National University, 12 Bandera Street, 79013 Lviv, Ukraine.
authors.forename: L
authors.initials: L
authors.lastname: Vasylechko
authors.affiliation: Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
authors.forename: D
authors.initials: D
authors.lastname: Sheptyakov
authors.affiliation: HASYLAB at DESY, Notkestrasse 85, 22607 Hamburg, Germany.
authors.forename: A M T
authors.initials: AM
authors.lastname: Bell
authors.affiliation: National Synchrotron Radiation Research Center (NSRRC), 101 Hsin-Ann Road, Hsinchu 30077, Taiwan.
authors.forename: T W
authors.initials: TW
authors.lastname: Pi
authors.affiliation: National Synchrotron Radiation Research Center (NSRRC), 101 Hsin-Ann Road, Hsinchu 30077, Taiwan.
authors.forename: H-J
authors.initials: HJ
authors.lastname: Lin
authors.affiliation: Institute of Physics, Academia Sinica, Taipei 11529, Taiwan.
authors.forename: M-K
authors.initials: MK
authors.lastname: Wu
authors.affiliation: CELLS-ALBA Synchrotron Radiation Facility, Carretera BP 1413, km 3.3, E-08290 Cerdanyola del Vallès, Barcelona, Spain.
authors.forename: E
authors.initials: E
authors.lastname: Pellegrin
authors.affiliation: CELLS-ALBA Synchrotron Radiation Facility, Carretera BP 1413, km 3.3, E-08290 Cerdanyola del Vallès, Barcelona, Spain.
authors.forename: S M
authors.initials: SM
authors.lastname: Valvidares
authors.affiliation: Max-Planck-Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany.
authors.forename: Z W
authors.initials: ZW
authors.lastname: Li
authors.affiliation: Max-Planck-Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany.
authors.forename: P
authors.initials: P
authors.lastname: Adler
authors.affiliation: Max-Planck-Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Todorova
authors.affiliation: Max-Planck-Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Küchler
authors.affiliation: Max-Planck-Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Steppke
authors.affiliation: Max-Planck-Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany.
authors.forename: L H
authors.initials: LH
authors.lastname: Tjeng
authors.affiliation: Max-Planck-Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany.
authors.forename: Z
authors.initials: Z
authors.lastname: Hu
authors.affiliation: Max-Planck-Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany.
authors.forename: A C
authors.initials: AC
authors.lastname: Komarek