Evidence of existence of metastable SrFe12O19 nanoparticles

Phase transformation of strontium hexagonal ferrite

“…The fitting procedure (Fig. 6) of the spectrum of the as made sample was developed in accordance with the model proposed previously by us [21]. As it can be seen from Table 1, only isomer shifts corresponding to Fe 3 þ were detected ( $0.3 to 0.4 mm/s).…”

“…Due to low temperature involved in the synthesis, the hexagonal ferrite could have crystal imperfections and some structural stresses. In our previous work we reported experimental evidence about the metastability of SrFe 12 O 19 powder obtained at 400°C under oxygen flow [21]. To our knowledge, there are no other reports on the subject.…”