Annealing dependence of magnetic interactions in YCo5(70%wt) + Y2Co17(30%wt) nanocomposite powders

X-ray diffraction (XRD) and DC-magnetization measurements were used to study the microstructure and magnetic properties of YCo5(70%wt) + Y2Co17(30%wt) nanocomposite powders prepared by mechanical milling followed by annealing at 800 °C. XRD data demonstrate that the annealing time t   has different effects on the average grain size 〈D〉〈D〉 of the two phases: for YCo5〈D〉〈D〉 stays almost constant at 14 nm for all values of t   (1.5min