Features of the Cation Distribution and Magnetic Properties of BaFe 12 − x Y x O 19 Hexaferrites

Using Mössbauer spectroscopy, magnetometry and X-ray diffraction, we have studied the BaY x Fe 12 – x O 19 hexaferrite (0.1 ≤ x ≤ 1.2). The low isomorphic capacitance of hexaferrite is shown, which leads to phase separation with the formation of ВаFe 2 O 4 and Y 3 Fe 5 O 12 for x = 0.6. Mössbauer spectroscopy data have shown that, in the studied range of substitutions, Y 3+ ions enter the 12 k position with the formation of a nonequivalent 12 k ' position due to the breaking of two Fe(12 k )–O–Fe(12 k ) magnetic bonds in the 12 k octahedron triad with their replacement by Fe(12 k )–O–Y (12 k ). The BaY x Fe 12 – x O 19 hexaferrite has been shown to be less magnetically hard than BaFe 12 – x Al x O 19 .