An approach to the bulk textured Fe81 Ga19 rods with large magnetostriction

Abstract

Bulk textured Fe81 Ga19 alloy with large magnetostiction of up to 830 ppm is fabricated using the technique of rapid directional solidification by triggering the undercooled Fe81 Ga19 melts. The saturation magnetostriction is about two times as large as the maximum of the earlier report on Fe-Ga bulk samples. The large magnetostriction is ascribed to the high concentration of Ga-Ga atom pairs created by rapid solidification and their preferential orientation in the [100] textured rod. © 2008 American Institute of Physics.