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Statements

Subject Item
n2:RIV%2F68378271%3A_____%2F09%3A00343463%21RIV11-MSM-68378271
rdf:type
n9:Vysledek skos:Concept
dcterms:description
We studied THz dielectric spectra of SrTiO3/DyScO3 epitaxial multilayers with four 50-nm-thick layers of each compound deposited on DyScO3 substrate as a function of temperature and electric field. At room temperature, SrTiO3 is in the paraelectric phase and the soft-mode frequency is shifted down to 47 cm-1. The ferroelectric phase transition occurs in the strained SrTiO3 layers around 270 K and in the ferroelectric phase the soft-mode hardening upon temperature decrease is observed. The soft mode is linearly coupled to an excitation of relaxation type at 10 cm-1 at all temperatures. This relaxation is silent in the paraelectric phase, but it becomes coupled to the polarization below the ferroelectric transition temperature. The recently proposed universal model of soft-mode behavior in strained SrTiO3 films [C. Kadlec et al., J. Phys.: Condens. Matter 21, 115902 (2009)] was generalized to describe the observed spectra at all temperatures and applied fields. We studied THz dielectric spectra of SrTiO3/DyScO3 epitaxial multilayers with four 50-nm-thick layers of each compound deposited on DyScO3 substrate as a function of temperature and electric field. At room temperature, SrTiO3 is in the paraelectric phase and the soft-mode frequency is shifted down to 47 cm-1. The ferroelectric phase transition occurs in the strained SrTiO3 layers around 270 K and in the ferroelectric phase the soft-mode hardening upon temperature decrease is observed. The soft mode is linearly coupled to an excitation of relaxation type at 10 cm-1 at all temperatures. This relaxation is silent in the paraelectric phase, but it becomes coupled to the polarization below the ferroelectric transition temperature. The recently proposed universal model of soft-mode behavior in strained SrTiO3 films [C. Kadlec et al., J. Phys.: Condens. Matter 21, 115902 (2009)] was generalized to describe the observed spectra at all temperatures and applied fields.
dcterms:title
Temperature and electric field tuning of the ferroelectric soft modein a strained SrTiO3 / DyScO3 heterostructure Temperature and electric field tuning of the ferroelectric soft modein a strained SrTiO3 / DyScO3 heterostructure
skos:prefLabel
Temperature and electric field tuning of the ferroelectric soft modein a strained SrTiO3 / DyScO3 heterostructure Temperature and electric field tuning of the ferroelectric soft modein a strained SrTiO3 / DyScO3 heterostructure
skos:notation
RIV/68378271:_____/09:00343463!RIV11-MSM-68378271
n3:aktivita
n12:Z n12:P
n3:aktivity
P(IAA100100907), P(LC512), Z(AV0Z10100520)
n3:cisloPeriodika
17
n3:dodaniDat
n11:2011
n3:domaciTvurceVysledku
n8:6410235 n8:6298753 n8:1959050 n8:5379369 n8:5666406 Skoromets, Volodymyr
n3:druhVysledku
n5:J
n3:duvernostUdaju
n10:S
n3:entitaPredkladatele
n15:predkladatel
n3:idSjednocenehoVysledku
345704
n3:idVysledku
RIV/68378271:_____/09:00343463
n3:jazykVysledku
n14:eng
n3:klicovaSlova
strontium titanate; terahertz; strained films; ferroelectrics
n3:klicoveSlovo
n4:strained%20films n4:ferroelectrics n4:strontium%20titanate n4:terahertz
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[C7FF45422748]
n3:nazevZdroje
Physical Review. B
n3:obor
n17:BM
n3:pocetDomacichTvurcuVysledku
6
n3:pocetTvurcuVysledku
8
n3:projekt
n13:IAA100100907 n13:LC512
n3:rokUplatneniVysledku
n11:2009
n3:svazekPeriodika
80
n3:tvurceVysledku
Kadlec, Filip Panaitov, G. Skoromets, Volodymyr Němec, Hynek Hlinka, Jiří Schubert, J. Kadlec, Christelle Kužel, Petr
n3:wos
000272310400034
n3:zamer
n18:AV0Z10100520
s:issn
1098-0121
s:numberOfPages
6