Spectroscopy of Cr3+in ferroelectric ceramics lead-lanthanum zirconate-titanate-x/95/5 with Lanthanum content x = 0.5 to 4 wt %

Autor:	C. Carabatos-Nédelec, A. Ridah, I. El-Harrad
Rok vydání:	2005
Předmět:	Ferroelectric ceramics Doping Analytical chemistry General Physics and Astronomy chemistry.chemical_element Mineralogy Titanate Condensed Matter::Materials Science chemistry Impurity Excited state visual_art Lanthanum visual_art.visual_art_medium Ceramic Spectroscopy
Zdroj:	Journal de Physique IV (Proceedings). 123:193-196
ISSN:	1155-4339
DOI:	10.1051/jp4:2005123033
Popis:	The study shows the importance of internal optical transitions 2 E → 4 A 2 of the excited Cr 3+ ions used as a probe of the ceramics in the microscopic scale. The results are interpreted in terms of Cr 3+ luminescent centres and simultaneous vibrational excitations of the lattice. In presence of thermally activated disorder, the PLZT-x/95/5 ferroelectric ceramics lead to interesting spectral variations with temperature by appearance of certain vibronic sidebands observed around the pure electronic transitions. The phononic origin of the process is analysed in terms of lattice perturbation in the environment of the Cr 3+ sites.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::071c1cea74cdfd50c46e500aa90e098e https://doi.org/10.1051/jp4:2005123033 Zobrazit plný text záznamu