Magnetic Structure of Hexagonal Mn-doped LuFeO$_{3}$

TL;DR

This study uses neutron scattering to analyze the magnetic and crystalline structures of Mn-doped LuFeO3, revealing antiferromagnetic order, enhanced superexchange interactions, and magnetic frustration influenced by local distortions.

Contribution

It provides detailed insights into the magnetic structure and interactions of Mn-doped LuFeO3, highlighting the effects of doping and local distortions on magnetic properties.

Findings

Crystalline structure matches hexagonal P6_3cm space group.

Antiferromagnetic order established below 134 K.

Enhanced superexchange interactions compared to LuMnO3.

Abstract

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.