Magnetic properties of amorphous Fe–Mo–B alloys

Abstract

The magnetization and Fe hyperfine fields of the series of amorphous alloys Fe80−xMoxB20 for x = 0, 2, 4, 7, 10, and 14 have been investigated. The magnetization at 4.2 K decreases from a value of 180 ± 2 emu/g for Fe80B20 to 79 ± 2 emu/g for Fe66Mo14B20 (1 emu = 10 A). The Fe hyperfine field is 2.91 × 105 Oe in Fe80B20 and shows a decrease of approximately 8 × 103 Oe/at. % of Mo (1 Oe = 79.6 A/m). The hyperfine field distributions show a growing low-field component with increasing x. Results are discussed in terms of previous measurements on similar alloys and the local environment of Fe atoms in transition metal glasses.