Structure and high temperature magnetic properties of nanocrystalline (Fe0.6Co0.4)86Hf7B6Cu1 alloy

The crystallization process, structure and high temperature magnetic properties of (Fe0.6Co0.4)86Hf7B6Cu1 alloy have been investigated. The alloy after annealing at 550 °C for 1 h exhibits the good soft magnetic properties with both small local coercivity and large magnetization. Furthermore, the coercivity measured at heating temperature point of this nanocrystalline alloy holds the value below 40 A/m until the onset of secondary crystallization corresponding to the formation of high coercivity phases. Nanocrystalline (Fe0.6Co0.4)86Hf7B6Cu1 alloy is one of the excellent candidates for soft magnetic materials used at high temperature applications with the range of 500–550 °C.