The paper presents the magnetic characterization of the nanocrystalline material for use in the stator core of the axial flux motor considering the effects of heat treatment, core potting and the frequency range of the motor application. The nanocrystalline soft material is obtained by rapid quenching from metal consisting of Fe, Si, B and some amounts of Cu and Nb with a specific heat treatment to create the grains which are extremely uniform and small in nanometer scale. These materials have attractive properties as low losses and high permeability in the high frequencies and offers excellent performance in terms of electromagnetic noise suppression due the small magnetostriction coefficient. The saturation magnetic induction of this material is slightly lower than that of commonly used silicon steel in electrical machines. The main applications of this material are magnetic components for electronic devices such as common mode chokes, high frequency power transformer, switch power supplies, inductors and current sensors, where the materials are characterized at high frequencies in the order of megahertz. In electric motors application is necessary to characterize the nanocrystalline soft material at low and medium frequency in the order of 50 to 1000Hz, considering the magnetic induction range up to magnetic saturation. The paper will present the results of magnetic characterizations and axial flux motor finite element analysis comparing with the laboratory tests results which despite the manipulation challenges arising from physical properties of the nanocrystalline soft material, the motor had a significant reduction in the iron losses at high frequency increasing its efficiency level in comparison to the same project based on silicon steel, which is the material traditionally used in the manufacture of electric motors. This gain led to a considerable reduction in the operating temperature and consequent increase in the power density of the motor.