Effect of high pressure on the hyperfine field and Curie temperature of an amorphous Fe86B14 alloy

In this paper, Mossbauer spectroscopy of an amorphous Fe86B14 alloy is carried out using a diamond-anvil type high-pressure cell under pressures up to 40 kbar at room temperature. The obtained high-pressure effect on the hyperfine field, (dHf/dp=-1.42 kOe/kbar, p≥6.5 kbar) is accounted for by the reduction of Fe atom magnetization at room temperature associated with an appreciable decrease of the Curie temperature, Tc, with increasing pressure. This indicates the Invar characteristics of this material. The pressure dependence of Tc is evaluated to be dTc/dp=-3.1 K/kbar, which is smaller than that reported previously by magnetic measurements.