Effects of Hydrogen Charging on the Structure and Electronic Properties of Nd-Fe and Nd-Fe-B Amorphous Alloys

摘要

The structure and electronic, magnetic and thermal properties of Nd-Fe and Nd-Fe-B amorphous alloys are modified appreciably by hydrogen charging. The feature and extent of the modification differ significantly between the two systems. This difference is primarily attributed to the effect of interatomic bonding, specifically Fe-B and Nd-H chemical bonding, as well as short-range order structure in the amorphous alloys. Changes in structure and electronic and magnetic properties of hydrogenated amorphous alloys have been investigated by measuring X-ray diffractographs, X-ray photoemission spectra, magnetic hysteresis curves and thermal desorption spectra, and discussed in terms of the bonding characteristics and SRO structure of the amorphous alloys.