Molecular field effect from Gd on collapse-like magnetic moment of Fe in (Fe1−xCrx)44Gd56

Abstract Well-known collapse-like decrease of Fe magnetic moment in amorphous (Fe–Cr) 80 B 10 P 10 was studied in detail by replacing the metalloid elements of P and B by Rare earth element of Gd. The Fe magnetic moment in amorphous (Fe–Cr) 44 Gd 56 alloy does not show the collapse-like behavior with the increase of Cr content and follows the normal Slater–Pauling curve. It suggested that the role of molecular field from Gd atoms on Fe atoms is important for the collapse-like behavior of Fe. Furthermore, the temperature dependence of magnetizations of the samples can be reproduced fairly well by a simple molecular field analysis and it is found that the introduction of Cr into Fe 44 Gd 56 causes the effect on the exchange interactions of J Fe–Fe and J Fe–Gd .