Low Temperature Measurements by Infrared Spectroscopy in CoFe$_2$O$_4$   Ceramic
  In this paper results of new far-infrared and middle-infrared measurements (wavenumber range of 4000cm-1 - 100cm-1) in the range of the temperature from 300K to 8K of the CoFe2O4 ceramic are presented. The bands positions and their shapes are the same in the wide temperature range. The quality of the sample was investigated by X-ray, EDS and EPMA studies. The CoFe2O4 reveals the cubic structure (Fd-3m) in the temperature range from 85K to 360 K without any traces of distortion. On the current level of knowledge the polycrystalline CoFe2O4 does not exhibit phase transition in the temperature range from 8 K to 300 K. 
Renata Bujakiewicz-Koro\'nska, {\L}ukasz Hetma\'nczyk, Barbara   Garbarz-Glos, Andrzej Budziak, Anna Kalvane, Karlis Bormani...
cond-mat.mtrl-sci