Abstract
The thermal expansion curves and some magnetic properties of Fe 90− x M x Zr 10 (M ≡ Co, Cr) ternary amorphous alloys were measured, and the dependence on effective electron number N eff of the spontaneous volume magnetostriction ω s and the average magnetic moment μ were obtained. The results show that the ω s has a maximum at N eff ≈ 8.1–8.2 where the μ begins to decrease drastically. This result provides experimental evidence that the Invar effect of the metal-metal amorphous alloys is also related to the instability of the ferromagnetism.
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