Abstract
Magnetic properties, thermal stability and structure of the alloys - (Fe0.6Co0.4)86Hf7B6Cu1 (1), (Fe0.7Co0.3)88Hf7B4Cu1 (2) and (Fe0.7Co0.3)88Hf4Mo2Zr1B4Cu1 (3) obtained in the form of ribbons quenched from the melt were investigated after their nanocrystallization in the course of the thermal (TA) and stress (SA) annealings in the air at different temperatures. In all three alloys SA resulted in the induction of magnetic anisotropy with an easy axis along the direction of the ribbon. It is established that the alloy 3 after SA at 620°C for 20 min has the best thermal stability of magnetic properties, which remained practically unchanged after the subsequent annealing at 550°C for 26 hours. Magnetic properties of the alloys 1 and 2 subjected to SA under the same conditions did not change after annealing at 500°C.
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