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Statements

Subject Item
n2:RIV%2F68407700%3A21340%2F04%3A04105309%21RIV%2F2005%2FMSM%2F213405%2FN
rdf:type
skos:Concept n16:Vysledek
dcterms:description
Článek popisuje použití spektroskopických sond při studiu feroelektrik 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  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  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. 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  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  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.
dcterms:title
Použití spektroskopických sond při studiu feroelektrik Application of Spectroscopic Probes in Study of Ferroelectrics Application of Spectroscopic Probes in Study of Ferroelectrics
skos:prefLabel
Application of Spectroscopic Probes in Study of Ferroelectrics Application of Spectroscopic Probes in Study of Ferroelectrics Použití spektroskopických sond při studiu feroelektrik
skos:notation
RIV/68407700:21340/04:04105309!RIV/2005/MSM/213405/N
n3:strany
57 ; 64
n3:aktivita
n9:Z
n3:aktivity
Z(MSM 210000022)
n3:cisloPeriodika
-
n3:dodaniDat
n13:2005
n3:domaciTvurceVysledku
n17:5906156
n3:druhVysledku
n12:J
n3:duvernostUdaju
n5:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
555183
n3:idVysledku
RIV/68407700:21340/04:04105309
n3:jazykVysledku
n11:eng
n3:klicovaSlova
Photoluminescence; Zero-phonon-line
n3:klicoveSlovo
n14:Zero-phonon-line n14:Photoluminescence
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[8D2A4D2564D4]
n3:nazevZdroje
Ferroelectrics
n3:obor
n10:BM
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
1
n3:rokUplatneniVysledku
n13:2004
n3:svazekPeriodika
298
n3:tvurceVysledku
Bryknar, Zdeněk
n3:zamer
n15:MSM%20210000022
s:issn
0015-0193
s:numberOfPages
8
n6:organizacniJednotka
21340