Investigation of the crystal and magnetic structures of BaFe12 - x Al x O19 solid solutions (x = 0.1‒1.2)

Functional Magnetic Composites Based on Hexaferrites: Correlation of the Composition, Magnetic and High-Frequency Properties

“…A res and W res increases monotonically with an increase in x in the 30 wt.% Ba(Fe 1−x Ga x ) 12 O 19 /epoxy composites. However, the values of ∆H were greater than those reported for BaFe 12−x Ga x O 19 , which can be explained by a random distribution of the anisotropy axes in the crystallites and by an increase of porosity and the random orientations of crystallites themselves [45][46][47][48][49]. This cause of A res variation from point to point within the material, in turn, broadening the resonance line.…”

Investigation into the structural features and microwave absorption of doped barium hexaferrites

“…The X-ray diffraction data correspond to single-phase samples with a hexagonal unit cell crystal structure and P6 3 / mmc space group, agreeing well with previous results obtained earlier for solid solutions with substitution by Al 3+ and In 3+ cations. [37][38][39] The low values of the fitting parameters, such as R wp (3.21-5.42), the weighted profile R-value, R exp (2.41-5.36), the expected R-value, R B (5.42-8.65), the Bragg R-factor and χ 2 (1.52-2.03), the goodness-of-fit quality factor, suggest that the studied sample is of good quality and that the refinements of the X-ray data have been effective. The a and c unit cell parameters are almost linear and they slightly decrease.…”

Structure and piezoelectric properties of Sm-doped BiFeO3 ceramics near the morphotropic phase boundary

“…Introduction Complex transition metal oxides attract scientific interest during the last decades due to the multiple phase transitions and related changes in the physical properties [1][2][3][4][5][6][7]. The most pronounced enhancement of the physical parameters has been observed for the BiFeO3-based compounds within the morphotropic phase boundaries [8][9][10] where their crystal structure is notably sensitive to external stimuli such as temperature, electric and magnetic field, mechanical stress, radiation etc.…”