Amorphicity, heterogeneity, and the Arrott plots

摘要

It is shown that experimental data on amorphous alloys are consistent with a heterogeneous system of ferromagnets, which implies an ill‐defined region of transition from ferromagnetism to paramagnetism. For a rather low degree of disorder, the transition may be almost as sharp as in a crystal. But in many cases a seemingly sharp transition at a well‐defined Curie point might originate from an inappropriate extrapolation of the Arrott plots. Properties and features of these plots are reviewed, with ways suggested for their interpretation.