The Importance of the Wigner-Seitz Cell Volume in Determining the Cobalt Site Occupancy in Nd₂(Fe,⁵⁷Co)₁₄B
The cobalt-57 emission Mössbauer spectrum of Nd2(Fe,57Co)14B has been analyzed with a model previously used to study Nd2Fe14B and related compounds. The preferential cobalt occupancies in Nd2Fe14B, obtained from the relative intensities of the six sextets used to fit the emission spectrum, show a virtually perfect linear correlation with the Wigner-Seitz cell volume of each of the six iron sites. Thus it would appear that the preferential site substitution of cobalt is controlled by the volume of the crystallographic site and the metallic radius of cobalt. This linear correlation provides support for the assignment of the weak sites in the Mössbauer spectrum of Nd2Fe14B.
G. J. Long and F. Grandjean, "The Importance of the Wigner-Seitz Cell Volume in Determining the Cobalt Site Occupancy in Nd₂(Fe,⁵⁷Co)₁₄B," Journal of Magnetism and Magnetic Materials, Elsevier, Jan 1996.
The definitive version is available at http://dx.doi.org/10.1016/S0304-8853(96)00289-2
Article - Journal
© 1996 Elsevier, All rights reserved.