Application of Spectroscopic Probes in Study of Ferroelectrics

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F03%3A04092927" target="_blank" >RIV/68407700:21340/03:04092927 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Application of Spectroscopic Probes in Study of Ferroelectrics
Original language description
Photoluminescence (PL), thermally stimulated luminescence (TSL), and photosensitivity of SrTiO3 and Cd2Nb2O7 crystals with Mn4+ and Cr3+ spectroscopic probes, respectively, were studied. Manganese doping of SrTiO3 results in structured luminescence of Mn4+ consisting of narrow zero-phonon (ZPL) R- line (2E r 4A2) and vibrational sidebands. It is suggested that unusually large temperature shift of ZPL is caused mainly by the contribution of the lowest TO soft optical branch into interaction of emitting center with a lattice. The PL spectrum of Cd2Nb2O7:Cr3+ consists of four narrow emission lines accompanied by vibrational sidebands. Emission lines are attributed to the zero-phonon transitions 2E r 4A2 of two kinds of octahedral coordinated Cr3+ centers.The change in activation energies of PL thermal quenching at Tc = 196 K is tentatively explained by a change of the adiabatic potential of the Cr3+ centers at the ferroelectric phase transition of Cd2Nb2O7 at Tc.
Czech name
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Czech description
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Publication year
2003
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
NATO Advanced Research Workshop on the Disordered Ferroelectrics
ISBN
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ISSN
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e-ISSN
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Number of pages
1
Pages from-to
48-48
Publisher name
Institute of Problems of Material Science NAS of Ukraine
Place of publication
Kyjev
Event location
Kyjev
Event date
May 29, 2003
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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