Low Temperature Measurements by Infrared Spectroscopy in CoFe$_2$O$_4$ Ceramic

TL;DR

This study presents infrared spectroscopy measurements of CoFe2O4 ceramic across a wide temperature range, revealing stable spectral features and confirming the absence of phase transitions from 8K to 300K.

Contribution

It provides new low-temperature infrared spectral data for CoFe2O4 and confirms its cubic structure remains unchanged from 8K to 360K.

Findings

Spectral bands remain consistent across the temperature range.

No phase transition observed from 8K to 300K.

Sample quality verified by X-ray, EDS, and EPMA.

Abstract

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.