The Curie temperature relaxation behavior in two amorphous ferromagnetic alloys (Fe10Co55Ni35)78Si8B14and Fe40Ni40P14B6(Metglas 2826) subjected to annealing at pressures up to 2 GPa is investigated. A comparison of the relaxed amounts ofTCdue to isothermal and isochronal annealings at 0, 1, and 2 GPa shows a delaying effect on the relaxation process during highhyphen;pressure annealing, while the concomitant kinetics of the processes remains unchanged. The pressurehyphen;induced percentage reductions inTCrelaxation are estimated to be 8percnt; and 12percnt; per GPa, respectively. The reversible relaxation behavior was found still present during highhyphen;pressure annealing, but with a reduced amplitude. By annealing between high and low pressures at fixed temperature, some regenerative relaxation behavior was observed after every completion of the cyclic pressures. The obtained results may be explained by pressurehyphen;induced narrowing of regions in the amorphous structure. It is suggested that these extended regions are the main locations where the compositional shorthyphen;range ordering contributed toTCrelaxation.
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