The Mössbauer spectra of Y2Fe14B have been measured from 85 to 296 K. Analysis of the spectra indicates that the near-neighbor rare-earth atoms directly influence the orientation of the principal axis of the electric field gradient. The hyperfine parameters are very similar to those of Nd2Fe14B, but the internal fields are somewhat smaller at room temperature in the yttrium compound. The Mösssbauer spectra of Y2(Fe1-xAlx) 14B, where x equals 0.00, 0.02, 0.04, 0.06, and 0.08, have been measured at 85 K. The average internal hyperfine field in these compounds decreases linearly with increasing aluminum content.
D. E. Tharp et al., "A Mössbauer Effect Study of Y2Fe14B and Its Aluminum Solid Solutions," Journal of Applied Physics, vol. 64, no. 10, pp. 5583-5585, American Institute of Physics (AIP), Nov 1988.
The definitive version is available at http://dx.doi.org/10.1063/1.342288
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