2013/10/14 by M. Mihalik, M. Mihálik, Mihalik, Matúš +17
Materials Science · #FOS: Physical sciences #Magnetic Properties and Applications #Magnetic and transport properties of perovskites and related materials #Materials Science (cond-mat.mtrl-sci)
paper · pdf · doi:10.48550/arxiv.1310.3592
openalex publication_date 2013/10/14 · openalex created_date 2022/09/14 · openalex updated_date 2026/07/28
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 \bf k = (000) and with the magnetic structure (Ax, Fy, Gz) for 1.6~K~< T < TN (≈ 59~K). The Nd-sublattice has a (0, fy, 0) contribution in the same temperature interval. The Mn sublattice undergoes spin-reorientation transition at T1 ≈ 13~K while the Nd magnetic moment keep ordered abruptly increases at this temperature. Powder X-ray diffraction shows a strong magnetoelastic effect at TN but no additional structural phase transitions from 2~K 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 the magnetic structure of Mn-sublattice in NdMn0.8Fe0.2O3 is a combination of the Mn and Fe parent compounds, but the magnetic ordering of Nd sublattice spans over broader temperature interval than in case of NdMnO3 and NdFeO3. This result is a consequence of the fact that the Nd ions do not order independently, but via polarization from Mn/Fe sublattice.