Magnetic State of Quasiordered Fe–Al Alloys Doped with Ga and B: Magnetic Phase Separation and Spin Order

Abstract

© 2018, Pleiades Publishing, Ltd. Results of structural, magnetic, and Mössbauer studies of quasi ordered alloys Fe65Al35 − xMx(Mx= Ga, B; x = 0, 5 at %) are presented. The magnetic state of examined structurally–single-phase alloys at low temperatures is interpreted from the viewpoint of magnetic phase separation. An explanation is proposed for the observed behavior of magnetic characteristics of Fe65Al35and Fe65Al30Ga5in the framework of the model of two magnetic phases, a ferromagnetic-type one and a spin density wave. The boron-doped alloy Fe65Al30B5is shown to demonstrate behavior that is typical of materials with the ferromagnetic type of ordering.