Zobrazeno 1 - 10
of 23
pro vyhledávání: '"I. El Harrad"'
Autor:
I. El-Harrad
Publikováno v:
Ferroelectrics. 371:43-47
Results of Raman spectroscopy study of the ceramics (Pb1 − 3X/2La X □ X/2 ) (Zr0.95Ti0.05)O3,denoted hereafter PLZT-x/95/5, with particular focus on the low frequency phonon dynamics are presented. The dynamic process that governs the low frequen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::76a4059474abde830faa70b0624e47db
https://doi.org/10.1080/00150190802385085
https://doi.org/10.1080/00150190802385085
Publikováno v:
Journal de Physique IV (Proceedings). 123:193-196
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 vibrat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::071c1cea74cdfd50c46e500aa90e098e
https://doi.org/10.1051/jp4:2005123033
https://doi.org/10.1051/jp4:2005123033
Autor:
I. El-harrad, A. Ridah
Publikováno v:
Ferroelectrics. 265:211-223
The effect caused by barium substitution in Pb-sublattice on the antiferro-ferro-paraelectric phase transitions sequence is Raman spectroscopically evidenced and discussed for the (Pb1-xBax)ZrO3 solid solution. With progressive increasing of barium c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d053d6f0957c3cbed493e09890bafe3d
https://doi.org/10.1080/00150190208260621
https://doi.org/10.1080/00150190208260621
Publikováno v:
Vibrational Spectroscopy. 26:7-14
Results of luminescence and Raman spectroscopy studies of PLZT-x/95/5 (1≤x≤4 mol%) ceramics with the emphasis on the phonon dynamics are presented. The luminescence spectrum of Cr3+ impurity ion in these ceramics is characteristic of strong cryst
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc41cec2c279cd16729b7a67724f6f61
https://doi.org/10.1016/s0924-2031(01)00093-5
https://doi.org/10.1016/s0924-2031(01)00093-5
Publikováno v:
Journal of Raman Spectroscopy. 29:123-129
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f93b60f207f4904c134e538933bdf41
https://doi.org/10.1002/(sici)1097-4555(199802)29:2<123::aid-jrs202>3.0.co
https://doi.org/10.1002/(sici)1097-4555(199802)29:2<123::aid-jrs202>3.0.co
Publikováno v:
Vibrational Spectroscopy. 10:301-309
Raman scattering investigations of lead-barium zirconate are presented for two barium concentrations, as a function of temperature from 10 to 450 K. An order-disorder phase transition is observed at 130 K for the low barium concentration, for which a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e7e95cc9b7057dfca76d62c72992adb5
https://doi.org/10.1016/0924-2031(95)00034-8
https://doi.org/10.1016/0924-2031(95)00034-8
Publikováno v:
Journal of Raman Spectroscopy. 26:1045-1049
It is demonstrated that in the ferroelectric phase of the PLZT-x/95/5 ceramics the spontaneous polarization is the order parameter, the fluctuations of which are mainly responsible for the dielectric relaxations manifested in the Raman spectra by the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc0f29dc830c279fa17a77dc7aa5876d
https://doi.org/10.1002/jrs.1250261205
https://doi.org/10.1002/jrs.1250261205
Publikováno v:
Journal of Applied Physics. 78:5581-5591
In a previous article, we proved and characterized a phase transition of an order‐disorder type, below room temperature, in the Pb1−3X/2LaX⧠X/2(Zr0.95Ti0.05)O3 (X=0.5–4 wt % La) ceramics. In the present article, the analysis of this order‐d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e7ca0fb39d5e5f06115e79e4e0cb9b6
https://doi.org/10.1063/1.359680
https://doi.org/10.1063/1.359680
Publikováno v:
Journal of Raman Spectroscopy. 25:799-804
Investigations of the Raman spectra of lead–lanthanum–zirconate-titanates (PLZT) x:95:5 (x = 0.5, 1, 2, 3 and 4 wt.% La2O3) ceramics over a range of temperature from 10 K to room temperature are presented. With increasing temperature the intensit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::495194adf5db6bc34ab39d075782918d
https://doi.org/10.1002/jrs.1250251005
https://doi.org/10.1002/jrs.1250251005
Publikováno v:
Ferroelectrics. 125:483-488
The ceramic solid solution of PbZr0.95Ti0.05O3:1%wtNb2O5 has been studied by X-rays texture and structure measurements, by electron scanning microscope observations, by Raman scattering and by infrared reflectivity experiments. We conclude for the is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b32c25378543a4a4a30e933016d30ddf
https://doi.org/10.1080/00150199208017115
https://doi.org/10.1080/00150199208017115