Atomic structure of the amorphous state of TiC-modified Nd2Fe14B as revealed by positron annihilation spectroscopy

The local electronic and chemical environment of TiC-modified Nd2Fe14B ribbons are studied using positron annihilation spectroscopy. Results show that higher concentration of alloying additions increases the shape parameter, S, of the symmetric Doppler-broadened positron-electron annihilation peak. This increase in S can be considered an increase in the amount of open volume in the quenched glass.