The X-ray photoemission and Co K -Edge X-ray absorption of Ba2CoWO6

TL;DR

This study investigates the structural, electronic, and optical properties of cubic Ba2CoWO6 using neutron diffraction, UV-vis spectroscopy, X-ray absorption, and photoemission techniques, revealing its crystal structure and local electronic environment.

Contribution

The paper provides a comprehensive analysis of Ba2CoWO6's properties using multiple spectroscopic and diffraction methods, offering new insights into its electronic and structural characteristics.

Findings

Cubic face-centered crystal structure with space group Fm3m.

No evidence of long-range magnetic order from 6K to 300K.

Electronic structure characterized by X-ray absorption and photoemission studies.

Abstract

The structural, electronic and optical properties of cubic double perovskite BaCoWO6 have been studied. Neutron powder diffraction data is collected on this sample from 6K to 300K. The crystal structure is face centered cubic, space group being Fm3m (No. 225). We did not find evidence for long range magnetic ordering in this system in this temperature range. The band-gap is estimated using Uv-vis spectroscopy. The Co-K edge X-ray absorption (XAFS) spectra of Ba2CoWO6 was analysed together with those Co-foil, which was used as reference compounds. X-ray photoemission spectroscopy (XPS), X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) studies give the insight of the electronic and structural information on the Co local environment for Ba2CoWO6.