Electronic structure and optical band gap of CoFe2O4 thin films
A. V. Ravindra, P. Padhan, and W. Prellier
TL;DR
This study investigates the electronic structure and optical properties of CoFe2O4 thin films, revealing cation ordering effects and size-dependent band gap variations, which are crucial for spinel phase applications.
Contribution
It provides new insights into cation ordering and quantum size effects in CoFe2O4 thin films, expanding understanding of their optical and structural properties.
Findings
Additional Raman modes indicate cation ordering.
Band gap expands as film thickness decreases.
Quantum size effects influence optical properties.
Abstract
Electronic structure and optical band gap of CoFe2O4 thin films grown on (001) oriented LaAlO3 have been investigated. Surprisingly, these films show additional Raman modes at room temperature as compared to a bulk spinel structure. The splitting of Raman modes is explained by considering the short-range ordering of Co and Fe cations in octahedral site of spinel structure. In addition, an expansion of band-gap is observed with the reduction of film thickness, which is explained by the quantum size effect and misfit dislocation. Such results provide interesting insights for the growth of spinel phases.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.