Magnetic structure of the mixed antiferromagnet
Journal Article
·
· Physical Review B
- Inst. of Experimental Physics SAS, Kosice (Slovak Republic)
- Helmholtz-Zentrum Berlin (HZB), (Germany)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division, Neutron Sciences Directorate
- Charles Univ., Prague (Czech Republic). Dept. of Condensed Matter Physics, Faculty of Mathematics and Physics
- VSB-Technical Univ. of Ostrava, Ostrava, Czech Republic (United States). Nanotechnology Centre & IT4 Innovations Center
- P. J. Safarik Univ., Kosice (Slovak Republic). Dept. of Inorganic Chemistry, Inst. of Chemistry
- Polish Academy of Sciences (PAS), Krakow (Poland). Henryk Niewodniczanski Inst. of Nuclear Physics
- 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
The magnetic structure of the mixed antiferromagnet NdMn0.8Fe0.2O3 was resolved. Neutron powder diffraction data definitively resolve the Mn sublattice with a magnetic propagation vector k=(000) and with the magnetic structure (Ax, Fy, Gz) for 1.6 K N(≈ 59 K). The Nd sublattice has a (0, fy, 0) contribution in the same temperature interval. The Mn sublattice undergoes a spin-reorientation transition at T1 ≈ 13 K while the Nd magnetic moment abruptly increases at this temperature. Powder x-ray diffraction shows a strong magnetoelastic effect at TN but no additional structural phase transitions from 3 to 300 K. Density functional theory calculations confirm the magnetic structure of the undoped NdMnO3 as part of our analysis. Taken together, these results show that the magnetic structure of the Mn sublattice in NdMn0.8Fe0.2O3 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 NdMnO3 and NdFeO3. 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.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1430607
- Alternate ID(s):
- OSTI ID: 1405218
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 13 Vol. 96; ISSN 2469-9950; ISSN PRBMDO
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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