We have used Mössbauer spectroscopy and neutron diffraction to study a series of Y2(Fe1-xMnx)1 4B samples in the composition range from x=0.0 to 0.4. Y 2(Fe0.6Mn0.4)14B is paramagnetic at both room temperature and 85 K. The iron quadrupole splitting in this paramagnetic compound allows us to place an upper limit on the quadrupole shift in the magnetic Y2(Fe1-xMnx) 14B alloys. Refinement of Y2(Fe 1-xMnx)14B neutron diffraction data have been used to give the site occupancies of manganese on the transition-metal sublattice. Both neutron diffraction patterns and Mössbauer effect spectra indicate a marked preference for the manganese to occupy the 8j2 site, which is the largest volume transition-metal site. Both experimental techniques give completely consistent results for the site occupancies in Y 2(Fe1-xMnx)14B.
O. A. Pringle et al., "Mössbauer and Neutron Diffraction Studies of Y2(Fe1-xMnx)14B," Journal of Applied Physics, vol. 64, no. 10, pp. 5580-5582, American Institute of Physics Publishing LLC, Feb 1992.
The definitive version is available at http://dx.doi.org/10.1063/1.342287
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