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Raman spectroscopy of Pb(Zr.sub.1-x./sub.Ti.sub.x./sub.)O.sub.3./sub. graded ceramics around the morphotropic phase boundary
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SYSNO ASEP 0362893 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Raman spectroscopy of Pb(Zr1-xTix)O3 graded ceramics around the morphotropic phase boundary Tvůrce(i) Buixaderas, Elena (FZU-D) RID, ORCID
Berta, Milan (FZU-D) ORCID
Kozielski, L. (PL)
Gregora, Ivan (FZU-D) RID, ORCIDZdroj.dok. Phase Transitions. - : Taylor & Francis - ISSN 0141-1594
Roč. 84, 5-6 (2011), s. 528-541Poč.str. 14 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova Raman spectroscopy ; PZT ceramics ; phonons ; ferroelectric phase transitions Vědní obor RIV BM - Fyzika pevných látek a magnetismus CEP KAN301370701 GA AV ČR - Akademie věd GAP204/10/0616 GA ČR - Grantová agentura ČR CEZ AV0Z10100520 - FZU-D (2005-2011) UT WOS 000290399800012 DOI 10.1080/01411594.2011.552049 Anotace Lead zirconate titanate ceramics with spatially graded composition from x=0.46 to 0.49 were studied by Raman scanning microscopy and the results were compared with Raman spectra in PZT ceramics of different compositions around the morphotropic phase boundary (MPB). An E-symmetry mode located near 200 cm-1 was found to be a measure of the tetragonality of PZT in both standard and graded ceramics. The singular value decomposition method was applied to decompose the experimental spectra of the graded ceramics. Two main contributions were found: one is related to the intensity of the main transverse modes; especially the E(TO2) mode; and it gives evidence of the change between tetragonal and rhombohedral symmetries in the sample; the second one shows changes just through the spatial MPB and it is related tothe intensities of A1(TO2) and E(LO2) modes. All the phonons involved in the main changes correspond to Zr and Ti vibrations. Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2012
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