It is known that besides ferromagnetic and paramagnetic behaviors, Fe100−xAlx alloys exhibit spin-glass and superparamagnetic behaviors. The magnetic spin-glass behavior is found in compounds with x = 25 - 30 while the superparamagnetic one has been found for the compound with x ≈ 30[1]. The fabrication of nanocrystalline alloys can be carried out by mechanical milling (MA), including two important effects: (i) the disordering of the structure, and (ii) the decrease in the grain size. Basically, Fe100−xAlx alloysprepared by MA exhibit magnetic behaviors dependent on Al content and the milling conditions[1-3]. This work reports the results of structural and magnetic studies for metastable alloys of Fe100−xAlx (x = 10, 30, 50, 70, and 90) prepared by MA, used a SPEX 8000 mixer, and the stainless steel vial and balls. The precursors of high-purity Fe and Al powders were combined stoichiometrically, and then milled for 24 hrs in Ar ambient. Final obtained products were studied structural characterization by using an x-ray diffractometer (XRD) and X-ray absorption spectroscopy. The morphology and the particle size are examined by scanning electron microscope (SEM). Their room-temperature magnetic properties were investigated by means of vibrating sample magnetometer (VSM). The structural analyses reveal that all the compounds were alloyed after 24-hrs milling. When varying Al content, XRD peaks related to Fe100−xAlx alloys become w ... 전체 초록 보기