Figure 12
(a) Mössbauer absorption spectra of (Nd0.91Bi0.09)Fe3(BO3)4 at 295 K, (b) temperature dependencies of the isomer shift δ(T) and (c) quadrupole splitting Δ(T). In part (b), the solid line approximates the experimental points according to the Debye model (Gutlich et al., 2011; Herber, 1984). In part (c), the arrow shows the anomaly of the Δ(T) dependence. |