Mössbauer Effect inDy160

Abstract

The Mössbauer effect has been used to study the hyperfine structure of ${\mathrm{Dy}}^{160}$ in various materials. Using Dy: ${\mathrm{Fe}}_2$Tb, the magnetic moment of the $2^{+}$ state of ${\mathrm{Dy}}^{160}$ has been determined to be 0.74 nm. The absorption spectrum in DyIG shows that there are two sites for the Dy ions, with magnetizations of 6.9 and 8.4 μβ. Magnetic hyperfine structure has been observed in paramagnetic ${\mathrm{Dy}}_2$ ${\mathrm{O}}_3$ and a preliminary analysis of the spectrum has been made; there is some general discussion of the interpretation of hyperfine structure in paramagnets. The results are compared with other measurements, particularly in ${\mathrm{Dy}}^{161}$.