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Title: Magnetic structure of the mixed antiferromagnet NdMn 0.8 Fe 0.2 O 3

The magnetic structure of the mixed antiferromagnet NdMn 0.8Fe 0.2O 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 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 0.8Fe 0.2O 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. Lastly, this result is a consequence of the fact that the Nd ions do not order independently, but via polarization from the Mn/Fe sublattice.
Authors:
 [1] ;  [1] ;  [2] ; ORCiD logo [3] ;  [4] ;  [5] ;  [5] ;  [6] ;  [7] ;  [8]
  1. Inst. of Experimental Physics SAS, Kosice (Slovak Republic)
  2. Helmholtz-Zentrum Berlin (HZB), (Germany)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division, Neutron Sciences Directorate
  4. Charles Univ., Prague (Czech Republic). Dept. of Condensed Matter Physics, Faculty of Mathematics and Physics
  5. VSB-Technical Univ. of Ostrava, Ostrava, Czech Republic (United States). Nanotechnology Centre & IT4 Innovations Center
  6. P. J. Safarik Univ., Kosice (Slovak Republic). Dept. of Inorganic Chemistry, Inst. of Chemistry
  7. Polish Academy of Sciences (PAS), Krakow (Poland). Henryk Niewodniczanski Inst. of Nuclear Physics
  8. Univ. of Florida, Gainesville, FL (United States). National High Magnetic Field Lab. (MagLab), Dept. of Physics; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Joint Inst. for Neutron Sciences; P. J. Safarik Univ., Kosice (Slovak Republic). Dept. of Condensed Matter Physics, Inst. of Physics
Publication Date:
Grant/Contract Number:
AC05-00OR22725; 283883; ITMS-26220120047; DMR-1202033; DMR-1157490
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 13; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE
OSTI Identifier:
1430607
Alternate Identifier(s):
OSTI ID: 1405218