Infra-red Spectroscopic Studies of GdBaCo2O5.5

TL;DR

This study uses infrared spectroscopy to investigate the magnetic and electronic phase transitions in GdBaCo2O5.5, revealing how vibrational modes relate to its complex magnetic and transport properties.

Contribution

It provides new insights into the correlation between vibrational spectra and magnetic/transport transitions in GdBaCo2O5.5.

Findings

Infrared spectra show shifts in Co-O vibrational modes with temperature.

Spectroscopic data explain magnetic and transport phase changes.

Charge transport mechanisms vary with temperature.

Abstract

This paper reports infrared spectroscopic studies on GdBaCo$_{2}$O$_{5.5}$ layered perovskite which exhibits successive magnetic transitions from paramagnetic to ferromagnetic to antiferromagnetic states as well as high temperature metal to insulator transition and a change in charge transport mechanism at low temperature. Infrared absorption spectra recorded at various temperatures in the range 80 K to 350 K reveal changes in the positions of Co-O stretching and bending frequencies which provide an explanation to the magnetic and transport behaviour of this compound.