Ferromagnetic Properties and Nanocrystallization Behavior of Amorphous (Fe(0.99)Mo(0.01)(78)Si9B13 Ribbons
ACADEMIA SINICA SHENYANG (CHINA) INST OF METAL RESEARCH
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Ferromagnetic properties and nanocrystallization process of soft ferromagnetic Fe0.99Mo0.0178Si9B13 ribbons are studied by transmission electron microscope TEM, X-ray diffraction XRD, Mossbauer spectroscopy MS, differential scanning calorimeters DSC and magnetization measurements. The Curie and crystallization temperature are determined to be Tsub c 665 K and Tsub x 750 K, respectively. The Tsub x value is in well agreement with DSC measurement results. X-ray diffraction patterns had shown a good reconfirm of two metastable phases Fe23B6, Fe3B were formed under in-Situ nanocrystallization process. Of which these metastable phases embedded in the amorphous matrix have a significant effect on magnetic ordering. The ultimate nanocrystalline phases of alpha-Fe Mo, Si and Fe2B at optimum annealing temperature bad been observed respectively. It is notable that the magnetization of the amorphous phase decreases more rapidly with increasing temperature than those of nanocrystalline ferromagnetism, suggesting the presence of the distribution of exchange interaction in the amorphous phase or high metalloid contents.
- Properties of Metals and Alloys
- Electricity and Magnetism