Multiple polarization mechanisms across the ferroelectric phase transition of the tetragonal tungsten-bronze Sr.sub.0.35./sub.Ba.sub.0.69./sub.Nb.sub.2./sub.O.sub.6.04./sub

Buixaderas, Elena; Kempa, Martin; Bovtun, Viktor; Kadlec, Christelle; Savinov, Maxim; Borodavka, Fedir; Vaněk, Přemysl; Steciuk, Gwladys; Palatinus, Lukáš; Dec, J.

doi:https://dx.doi.org/10.1103/PhysRevMaterials.2.124402

Počet záznamů: 1

Multiple polarization mechanisms across the ferroelectric phase transition of the tetragonal tungsten-bronze Sr.sub.0.35./sub.Ba.sub.0.69./sub.Nb.sub.2./sub.O.sub.6.04./sub

1.

SYSNO ASEP	0499771
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Multiple polarization mechanisms across the ferroelectric phase transition of the tetragonal tungsten-bronze Sr_0.35Ba_0.69Nb₂O_6.04./sub
Tvůrce(i)	Buixaderas, Elena (FZU-D)_{RID, ORCID} Kempa, Martin (FZU-D)_{RID, ORCID} Bovtun, Viktor (FZU-D)_{RID, ORCID, SAI} Kadlec, Christelle (FZU-D)_{RID, ORCID} Savinov, Maxim (FZU-D)_{RID, ORCID} Borodavka, Fedir (FZU-D)_{RID, ORCID} Vaněk, Přemysl (FZU-D)_{RID, ORCID} Steciuk, Gwladys (FZU-D)_ORCID Palatinus, Lukáš (FZU-D)_{RID, ORCID} Dec, J. (PL)
Celkový počet autorů	10
Číslo článku	124402
Zdroj.dok.	Physical Review Materials. - : American Physical Society - ISSN 2475-9953 Roč. 2, č. 12 (2018), s. 1-12
Poč.str.	12 s.
Jazyk dok.	eng - angličtina
Země vyd.	US - Spojené státy americké
Klíč. slova	broad-band dielectric spectroscopy ; phonons ; tetragonal tungsten-bronzes ; ferroelectricity
Vědní obor RIV	BM - Fyzika pevných látek a magnetismus
Obor OECD	Condensed matter physics (including formerly solid state physics, supercond.)
CEP	GA16-09142S GA ČR - Grantová agentura ČR
Institucionální podpora	FZU-D - RVO:68378271
UT WOS	000454435900003
EID SCOPUS	85060591505
DOI	10.1103/PhysRevMaterials.2.124402
Anotace	The broadband dielectric response of the uniaxial ferroelectric strontium barium niobate with 35% Sr has been studied from 1 kHz to 30 THz along the polar c axis using high-frequency and low-frequency dielectric spectroscopies, time-domain terahertz spectroscopy, and far-infrared reflectivity, in the wide temperature interval 20–600 K. The mechanisms that contribute to the ferroelectric phase transition and to the dielectric anomaly in this material are the softening of an anharmonic excitation in the THz range related to cation hopping and the slowing down of a relaxation in the GHz range, which saturates below TC near 1 MHz. In the ferroelectric phase, a relaxation, related to domain-wall dynamics, appears in the sub-GHz range and hardens on cooling up to 10 GHz. The ferroelectric-paraelectric transition, investigated by electron diffraction, has been assessed to the appearance of a supplementary mirror plane perpendicular to the polar axis.
Pracoviště	Fyzikální ústav
Kontakt	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Rok sběru	2019

Počet záznamů: 1