A combined electron spin resonance (ESR) and atomic force microscopy (AFM) study on Cedsamples 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<inf>eff</inf> ≈2; 2.8; 6. With increasing x, this pattern merges into a single g<inf>eff</inf>≈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.

Electron Spin Resonance and Atomic Force Microscopy Study on Gadolinium Doped Ceria / C. Oliva, F. Orsini, S. Cappelli, P. Arosio, M. Allieta, M. Coduri, M. Scavini. - In: JOURNAL OF SPECTROSCOPY. - ISSN 2314-4920. - 2015(2015), pp. 491840.1-491840.6. [10.1155/2015/491840]

Electron Spin Resonance and Atomic Force Microscopy Study on Gadolinium Doped Ceria

C. Oliva;F. Orsini;S. Cappelli;P. Arosio;M. Allieta;M. Coduri;M. Scavini
2015

Abstract

A combined electron spin resonance (ESR) and atomic force microscopy (AFM) study on Cedsamples 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 geff ≈2; 2.8; 6. With increasing x, this pattern merges into a single geff≈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.
spectroscopy; analytical chemistry; atomic and molecular physics, and optics
Settore CHIM/02 - Chimica Fisica
JOURNAL OF SPECTROSCOPY
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/332484
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