Mössbauer study of the permanent-magnet material Nd2(Fe1−xNix)14B

Abstract
Samples of Nd2(Fe1−xNix)14B, 0≤x≤0.20, with good phase homogeneity have been made by heating under vacuum for 300 h. 57Fe Mössbauer parameters have been determined for all six different iron crystallographic sites at room temperature. The nickel atoms preferentially substitute for iron atoms on the 16k2 and 8j2 sites. The nickel atoms seem to alter the hyperfine parameters of the 57Fe nuclei via localized interactions.