Abstract
The morphology, phase structure, saturation magnetization and coercive force of untreated, cryogenically treated and cryogenically treated and tempered cobalt samples has been investigated for studying the changes in microstructure, and magnetic properties. The result illustrates a noteworthy variation in the phase structure of cobalt after the cryogenic treatment. The saturation magnetization was unaffected, whereas an improvement in the coercive force has been detected. The XRD peak intensity of cryogenic cryogenically treated cobalt specimen reveals the cobalt phase transformation exhibiting a higher ε-Co (hexagonal structure), which shoots up the coercive force. Additional tempering after cryogenic treatment has an insignificant effect on the analyzed properties.
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