Abstract
A combined magnetic, neutron diffraction and field-dependent 57Fe Mössbauer study of Sc-substituted Ba-hexaferrite in powder form is reported, and the findings are compared with the data for BaFe 12O 19. The five cation sublattice with collinear ferrimagnetic structure of uniaxial (Gorter) type for BaFe 12O 19, persists also for BaFe 10.4Sc 1.6O 19 at room temperature and below down to 130–190 K, depending on the applied field. Below room temperature, BaFe 10.4Sc 1.6O 19 undergoes a magnetic transition as indicated by the magnetization and Mössbauer spectroscopic measurements. The neutron diffraction results are compatible with a gradual transformation below 190 K into a complex canted structure with spins pointing out of the axial direction. The complex magnetic order at 10 K can be described in terms of an incommensurate complex block-type conical structure.
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