Structural Refinement of Highly Textured Hexagonal Ferrite Using X-ray Powder Diffraction Data

Abstract

The structural refinement using X-ray powder diffraction data was performed on the highly textured rectangular SrFe₁₂O₁₉ bar (M-type hexagonal ferrite) which was prepared by a conventional ceramic process. The difference between calculated and observed intensities in the X-ray patterns due to the preferred orientation was minimized by the generalized spherical harmonic function. The finally converged weighted R-factor (R_wp) for the longitudinal and the horizontal sections was 13.72% and 13.56%, respectively. Refined lattice parameters of the rectangular SrFe₁₂O₁₉ bar were a(=b)=5.8901(2) Å, c=22.9982(2) Å for the longitudinal, and a(=b)=5.8865(2) Å, c=22.9537(2) Å for the horizontal section, respectively. Other crystallographic data were well in accordance with those of randomly oriented synthesized-powder of SrFe₁₂O₁₉.