Magnetic and Mössbauer Spectral Properties of the Compound Nd₆Fe₁₃Au
The magnetic properties of Nd6Fe13Au were studied by means of magnetic measurements and iron-57 Mössbauer spectroscopy. It is shown that magnetic ordering of the Fe moments occurs at temperatures much above room temperature (TN = 408 K). At low temperatures, the net moment of Nd6Fe13Au is very small owing to mutual compensation of the contributions of the various magnetic sublattices involved. High-field measurements made at 4.2 K show that ferromagnetic alignment of the sublattice moments is reached in two steps via first-order magnetic phase transitions. The Mössbauer spectra reveal that the Zeeman splitting gradually decreases with increasing temperature and that the average hyperfine field is zero at 435 K and above. Between 325 K and 411 K the area in the Mössbauer spectra due to the ordered magnetic component decreases gradually as it is replaced by a quadrupole doublet.
C. H. De Groot et al., "Magnetic and Mössbauer Spectral Properties of the Compound Nd₆Fe₁₃Au," Journal of Alloys and Compounds, Elsevier, Jan 1996.
The definitive version is available at http://dx.doi.org/10.1016/0925-8388(95)02007-1
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