A magnetic and Mossbauer spectral study of the spin reorientation in NdFe11Ti an NdFe11TiH

The magnetic properties of NdFe11Ti and NdFe11TiH are determined through combined ac magnetic susceptibility, thermomagnetic, and iron-57 Mossbauer spectral studies. The results indicate that NDFe11Ti and NdFe11TiH undergo a spin-reorientation transition at tilde 185 K and at 100 plusmn 1 K, respectively, from an axial magnetic phase at higher temperatures to a canted or basal magnetic phase at lower temperatures.