Elucidation of atomic and magnetic structures of Al3+-doped Li-ferrite (LiFe5O8) compounds

Inckemann, S. ; Park, S.-H. ; Arauzo, A. (Universidad de Zaragoza) ; Avdeev, M.

Resumen: Chemical stress for structural deformation in [fórmula], denoted as Li60Al40, and [fórmula] , denoted as Li50Al50, was achieved by introducing [fórmula] into α-[fórmula] known as a high-temperature multiferroic. These new solid solution compounds crystallize in the tetragonal space group P43212. Their magnetic spin arrangements at 300 K could be determined in the magnetic space group P4321
using high-resolution neutron powder diffraction (HRNPD) data. Within the experimental uncertainty in HRNPD, the magnetic moments of Fe3+ ions within FeO6 in the B-sublattice are arranged along the crystallographic c axis and antiparallel to those of FeO4 in the A-sublattice. In comparison to the Fe-rich Li60Al40, the Fe-poor Li50Al50 shows a stronger dilute effect for the higher Li content at the octahedral site Fe1b. The dilute effect is associated with the lowering of both saturation magnetization and Tc . On the other hand, Li50Al50 shows large electric dipole moments in the strong distorted [fórmula] and [fórmula] polyhedra.

Idioma: Inglés

DOI: 10.1016/j.jssc.2025.125325

Año: 2025

Publicado en: JOURNAL OF SOLID STATE CHEMISTRY 347 (2025), 125325 [12 pp.]
ISSN: 0022-4596

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)