Thermal stability of the nanocrystalline Fe–Co–Hf–B–Cu alloy

Nanocrystalline $({\mathrm{Fe}}_{\text{1−x}}{\mathrm{Co}}_x{)}_{88}{\mathrm{Hf}}_{\mathrm{7}}{\mathrm{B}}_{\mathrm{4}}{\mathrm{Cu}}_{\mathrm{1}}$ alloys have been investigated as candidates for soft magnetic materials for high temperature applications. Four samples were obtained in annealed or as-spun ribbons with $\text{x=0,0.10,0.30,0.44.}$ Magnetic properties and thermal stability were studied focusing on the x=0.30 alloy by means of different thermal analysis, hysteresisgrapher, impedance analyzer, transmission electron microscope, etc.