Mossbauer studies in sputtered A-Fe80B20foils

Mossbauer studies have been carried out on sputtered amorphous Fe
80
B
20
foils in the temperature range of 4.4 K to 300 K. The results have been analysed using Window's method. The coefficients B and C in Bloch's law are evaluated from the data. One finds a smaller value of B in sputtered foils in comparison to the liquid quenched ribbons. There are indications that the mean square range of exchange interaction is larger in these foils.