Investigation of oriented Co3+ doped M-type hexaferrite Sr0.5Ba0.5Fe12−xCoxO19 for microwave application
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We prepared oriented Co3+ doped M-type hexaferrites Sr0.5Ba0.5Fe12 – XCoXO19 (x = 0 – 1) with tunable anisotropy field. The magnetic properties of Sr0.5Ba0.5Fe12 – XCoXO19 with different Co3+ content were investigated. Results show that the particles of powder samples with different Co3+ content are aligned and have a similar hexagonal shape. The saturation magnetization increases firstly and then decrease with the increase in Co3+ content. The coercive field decrease sharply with little Co3+ content and then stand at a low level. Calculated magnetic anisotropy field show that substitution of Co3+ for Fe3+ can adjust the anisotropy filed from 21kOe to 15kOe. Furthermore, we also observed the sample changing from uniaxial anisotropy to plane anisotropy.
This work was supported by the National Natural Science Foundation of China (Grant Nos. 61671118 and 61371053).
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