Secondhyphen;order Doppler shift in Mouml;ssbauer spectra of Fehyphen;B and Fehyphen;P amorphous alloys

摘要

The change of secondhyphen;order Doppler shift with temperature in Mouml;ssbauer effect measurements was estimated by using the twohyphen;band model with two characteristic temperatures, thgr;1and thgr;3, rather than the Debye model. The experimental results for Fe83B17, Fe80B20, and Fe80P20amorphous alloys were in good agreement with the calculated ones. The isomer shift was also obtained and the bonding characteristics andshyphen;electron density of the iron atoms in these substances were discussed.