Abstract
Y-type hexagonal ferrites of Ba0.5Sr1.5Zn2Fe(12-x)GaxO22 (x = 0, 0.2, 0.4, 0.6, 0.8 and 1) are synthesized by chemical co-precipitation method. X-ray diffraction (XRD) analysis reveals that the samples are single-phase and the space group is R3¯m. The field-emission scanning electronic microscope (FE-SEM) results indicate that the grains are regular fibrous shape with a width of about 2–5 µm and a thickness of 1–3 µm. In the M-T diagram, it can be observed that the temperature at which the transition from helical to ferrimagnetic (TS) increases first and then decreases with increasing substitution amount x. From σ-H, the values of coercive field (HC) experience alternating decreases and increases, and reaches a maximum value of 567.34 Oe at x = 0.8. While the specific saturation magnetization (σS) values exhibit a monotonic decrease with the increasing x. The variations in magnetic properties can tentatively be ascribed to the effect of Ga3+ substitution. These results above might be used as promising candidates in electric devices.
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