Investigation of the Critical Behavior, Magnetocaloric Effect and Hyperfine Structure in the FeNbB Powders.

Microstructure as well as magnetic, thermal and magnetocaloric properties of the mechanically alloyed FeNbB powders have been investigated by means of Mössbauer spectrometry, differential scanning calorimetry (DSC), and magnetic measurements. The Mössbauer spectrometry results showed the formation of nanostructured Fe(B) and Fe(Nb) solid solutions, FeB boride, and an amorphous phase. The endothermic and exothermic peaks that are observed in the DSC curves might be related to the Curie temperature, and the crystallization of the amorphous phase, respectively.