Magnetic Structure of Hexagonal Mn-doped LuFeO$_{3}$
  Neutron scattering techniques are used to investigate the crystalline and magnetic structure of LuFe$_{0.75}$Mn$_{0.25}$O$_{3}$ in bulk polycrystalline form. We find that the crystalline structure is described by the hexagonal P6$_{3}$cm space group similar to that of thin-film LuFeO$_{3}$, and that the system orders antiferromagnetically below T$_{N}$ = 134 K. Inelastic neutron scattering reveals nearest-neighbor superexchange parameters that are enhanced relative to LuMnO$_{3}$. The observation of significant diffuse scattering above T$_{N}$ demonstrates the frustrated nature of the system; comparisons with similar materials suggest the ground state magnetic configuration is sensitive to local crystallographic distortions. 
Steven M. Disseler, Xuan Luo, Yoon Seok Oh, Rongwei Hu, Dylan   Quintana, Alexander Zhang, Jeffrey W. Lynn, Sang-Wook Cheong...
cond-mat.mtrl-sci