NANOCRYSTALLINE Fe₇₀Al₃₀ ALLOYS FORMED BY MECHANICAL ALLOYING: STRUCTURE AND MAGNETIC PROPERTIES

Nanocrystalline alloys Fe₇₀Al₃₀ prepared by mechanical alloying studied by various structurally sensitive contain the disordered bcc Fe(Al) solid solution with minimum crystallites size of 7 nm at longest milling periods. Magnetization and Mässbauer data show that the amorphized layers developing at grain boundaries suppress a dimensionality of the magnetic exchange interactions leading to the intermediate magnetization decrease. The most common nearest neighbor surrounding of the Fe is composed of 5 and more Fe atoms.