The temperature dependence of the magnetization for Fe88Zr7B4Cu1 amorphous alloy has been measured. M(T) has been fit using a Handrich–Kobe model with a modified Brillouin function with an additional exchange fluctuation term. Here for the first time, an asymmetrical distribution of the exchange interactions is proposed based on empirical knowledge of the Bethe–Slater curve. A two-parameter exchange fluctuation is shown to give significantly better fits to M(T) for these amorphous alloys.
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Gallagher et al. (1999) studied this question.
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