Comparison between the electron paramagnetic resonance spectra obtained in X- and W-bands on a fired clay: a preliminary study

Autor:	Jean-Victor Zanchetta, B. Deroide, Y. Bensimon
Rok vydání:	1999
Předmět:	Chemistry Analytical chemistry Resonance General Chemistry Condensed Matter Physics Signal Spectral line law.invention Paramagnetism Nuclear magnetic resonance Amplitude law visual_art visual_art.visual_art_medium General Materials Science Ceramic Electron paramagnetic resonance Superparamagnetism
Zdroj:	Journal of Physics and Chemistry of Solids. 60:813-818
ISSN:	0022-3697
DOI:	10.1016/s0022-3697(98)00334-5
Popis:	A clay was fired at 800°C, which is the firing temperature generally observed in the manufacture of ancient pottery. The sample was studied by electronic paramagnetic resonance (EPR). The spectra are characteristic of Fe 3+ in different environments. They were recorded at X-band (9.8 GHz) and W-band (95.5 GHz). At low temperature the amplitude of the signal, ascribed to superparamagnetic iron, decreases. In W-band and at low temperature this signal disappears almost completely. The remaining signals are ascribed to sites distribution of variable symmetries. The simplification of the spectrum obtained in W-band seems to indicate that this frequency domain is very adequate to study ancient ceramics using this technique.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::22dc0064f63817da16299e1d5f6fe486 https://doi.org/10.1016/s0022-3697(98)00334-5 Zobrazit plný text záznamu Full Text from ScienceDirect