Thermal stability of amorphous structure and magnetic properties Fe80–xCoxP14B6 (x = 20–40) ribbons

Amorphous structure and its thermal stability as well as magnetic properties of Fe 80-x Co x P 14 B 6 (20 ≤ x ≤ 40) glasses have been studied by X-ray diffraction, non-isothermal differential scanning calorimetry (DSC) and thermomagnetic (TMG) measurements. The Curie temperature increases with Co content, while the glass transition and crystallization onset temperatures decrease. As a result, for alloys x = 30, 32 and 35 at%, the transition into paramagnetic state take place close to glass transition temperature. However, for x = 40 at% the TMG curve, in the vicinity of magnetic transition temperature, is overlapped by ferromagnetic crystallization products.