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Magnetic structure of the mixed antiferromagnet NdMn_(0.8)Fe_(0.2)O_3

机译：混合反铁磁体NdMn_（0.8）Fe_（0.2）O_3的磁性结构

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摘要

The magnetic structure of the mixed antiferromagnet NdMn_(0.8)Fe_(0.2)O_3 was resolved. Neutron powder diffraction data definitively resolve the Mn sublattice with a magnetic propagation vector k = (000) and with the magnetic structure (A_x,F_y,G_z) for 1.6 K < T < T_N (≈59 K). The Nd sublattice has a (0,f_y,0) contribution in the same temperature interval. The Mn sublattice undergoes a spin-reorientation transition at T_1 ≈ 13 K while the Nd magnetic moment abruptly increases at this temperature. Powder x-ray diffraction shows a strong magnetoelastic effect at T_N but no additional structural phase transitions from 3 to 300 K. Density functional theory calculations confirm the magnetic structure of the undoped NdMnO_3 as part of our analysis. Taken together, these results show that the magnetic structure of the Mn sublattice in NdMn_(0.8)Fe_(0.2)O_3 is a combination of the Mn and Fe parent compounds, but the magnetic ordering of the Nd sublattice spans a broader temperature interval than in the case of NdMnO_3 and NdFeO_3. This result is a consequence of the fact that the Nd ions do not order independently, but via polarization from the Mn/Fe sublattice.
机译：解决了混合反铁磁体NdMn_（0.8）Fe_（0.2）O_3的磁性结构。中子粉末衍射数据以1.6 K

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  • 来源
    《Physical review》 |2017年第13期|134430.1-134430.10|共10页
  • 作者

    Matus Mihalik; Marian Mihalik; Andreas Hoser; Daniel M. Pajerowski; Dominik Kriegner; Dominik Legut; Kristof M. Lebecki; Martin Vavra; Magdalena Fitta; Mark W. Meisel;

  • 作者单位

    Institute of Experimental Physics SAS, Watsonova 47, 040 01 Kosice, Slovak Republic;

    Institute of Experimental Physics SAS, Watsonova 47, 040 01 Kosice, Slovak Republic;

    Helmholtz-Zentrum Berlin, Hahn-Meitner-Platz 1, 14109 Berlin, Germany;

    Quantum Condensed Matter Division, Neutron Sciences Directorate, Oak Ridge National Laboratory,Oak Ridge, Tennessee 37831, USA;

    Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, CZ-12116 Praha 2, Czech Republic;

    Nanotechnology Centre & IT4Innovations Center, VSB-Technical University of Ostrava, 17. listopadu 15, CZ-708 33 Ostrava, Czech Republic;

    Nanotechnology Centre & IT4Innovations Center, VSB-Technical University of Ostrava, 17. listopadu 15, CZ-708 33 Ostrava, Czech Republic;

    Department of Inorganic Chemistry, Institute of Chemistry, Faculty of Science, P. J. Safdrik University,Moyzesova 11, 041 54 Kosice, Slovak Republic;

    Institute of Nuclear Physics Polish Academy of Sciences, Radzikowskiego 152, 31-342 Krakow, Poland;

    Department of Physics and National High Magnetic Field Laboratory, University of Florida, Gainesville, Florida 32611-8440, USA,Joint Institute for Neutron Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6453, USA,Department of Condensed Matter Physics, Institute of Physics, Faculty of Science, P. J. Safdrik University, Park Angelinum 9, 041 54 Kosice, Slovak Republic;

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