Electron Spin Resonance and Atomic Force Microscopy Study on Gadolinium Doped Ceria. (29th January 2015)

• Record Type: Journal Article
• Authors: Oliva, Cesare; Orsini, Francesco; Cappelli, Serena; Arosio, Paolo; Allieta, Mattia; Coduri, Mauro; Scavini, Marco
• Other Names: Cooke Stephen Academic Editor.
• Is Part Of: Journal of spectroscopy. Volume 2015(2015)
• Publication Date: 2015-01-29
• Subjects: Spectrum analysis -- Periodicals; 543.505
• DOI: 10.1155/2015/491840
• Languages: English
• ISSNs: 2314-4920

Abstract

Abstract : A combined electron spin resonance (ESR) and atomic force microscopy (AFM) study on Ce1− x Gd x O2− x /2 samples is here presented, aimed at investigating the evolution of the ESR spectral shape as a function of x in a wide composition range. At low x = 0.02, the spectrum is composed of features at g eff ≈ 2 ; 2.8; 6. With increasing x, this pattern merges into a single g eff ≈ 2 broad ESR curve, which assumes a Dysonian-shaped profile at x ≥ 0.5, whereas, at these x values, AFM measurements show an increasing surface roughness. It is suggested that the last could cause the formation of surface polaritons at the origin of the particular ESR spectral profile observed at these high Gd doping levels.