Magnetic properties of Ni–Co doped barium strontium hexaferrite

Abstract

A series of Ni-Co substituted barium strontium hexaferrite materials, Ba 0.5 Sr 0.5 Ni x Co x Fe 12-2x O 19 (x = 0.0, 0.2, 0.4, 0.6, 0.8 mol%) was synthesized by the sol-gel method. X-ray diffraction analysis has shown that the NiCo substitutions maintain in a single hexagonal magnetoplumbite phase. The room temperature magnetic properties and the cation site preferences of Ni-Co substituted ferrite were investigated by VSM. Substitutions led to decrease in coercivity while saturation magnetization remains the almost same. It indicates that the saturation magnetization (52.81-59.8 Am 2 /kg) and coercivity (69.83-804.97 Oe) of barium strontium hexaferrite samples can be varied over a very wide range by an appropriate amount of Ni-Co doping contents.

Microstructures and Properties of 3Y‐TZP/Ba0.5Sr0.5Fe12O19 Composites Prepared by Two Methods

“…The microstructures and mechanical and electromagnetic properties of 3Y‐TZP/Ba 0.5 Sr 0.5 Fe 12 O 19 composites prepared by two methods are investigated in this work. The Ba 0.5 Sr 0.5 Fe 12 O 19 is chosen as a second phase and is expected to modify the magnetic properties of the BaFe 12 O 19 . Two methods are adopted and compared to obtain the composites with fine and homogeneously dispersed grains of the second phase.…”

“…The Ba 0.5 Sr 0.5 Fe 12 O 19 is chosen as a second phase and is expected to modify the magnetic properties of the BaFe 12 O 19 . [19][20][21][22] Two methods are adopted and compared to obtain the composites with fine and homogeneously dispersed grains of the second phase. The distribution of the Ba 0.5 Sr 0.5 Fe 12 O 19 phase is described quantitatively using the fractal theory.…”