Figure 4
(a) Rocking curves of the pure nuclear (333) reflection (in absolute vertical scale) and of the electronic Umweg reflection (arbitrary vertical scale) of the 57FeBO3 crystal for temperatures in the vicinity of the Néel point. The arrows show the angular positions where the Mössbauer absorption spectra were measured. (b) and (c) Mössbauer absorption spectra of the single-line absorber measured at angular positions 1 and 2, respectively, at an iron borate crystal temperature of 348.90 K. |