High-frequency dielectric properties of K.sub.1-x./sub.Li.sub.x./sub.TaO.sub.3./sub. ceramics compared to crystals

Nuzhnyy, Dmitry; Petzelt, Jan; Bovtun, Viktor; Kempa, Martin; Repček, Dalibor; Tkach, A.; Vilarinho, P. M.; Kamba, Stanislav

doi:https://dx.doi.org/10.1016/j.jeurceramsoc.2023.04.037

Počet záznamů: 1

High-frequency dielectric properties of K.sub.1-x./sub.Li.sub.x./sub.TaO.sub.3./sub. ceramics compared to crystals

1.

SYSNO ASEP	0573146
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	High-frequency dielectric properties of K_1-xLi_xTaO₃ ceramics compared to crystals
Tvůrce(i)	Nuzhnyy, Dmitry (FZU-D)_{RID, ORCID} Petzelt, Jan (FZU-D)_{RID, ORCID, SAI} Bovtun, Viktor (FZU-D)_{RID, ORCID, SAI} Kempa, Martin (FZU-D)_{RID, ORCID} Repček, Dalibor (FZU-D)_ORCID Tkach, A. (PT) Vilarinho, P. M. (PT) Kamba, Stanislav (FZU-D)_{RID, ORCID, SAI}
Celkový počet autorů	8
Zdroj.dok.	Journal of the European Ceramic Society. - : Elsevier - ISSN 0955-2219 Roč. 43, č. 12 (2023), s. 5241-5247
Poč.str.	7 s.
Jazyk dok.	eng - angličtina
Země vyd.	NL - Nizozemsko
Klíč. slova	Li-doped KTaO₃ ; dielectric spectroscopy ; ferroelectrics ; phase transition ; soft mode
Vědní obor RIV	BM - Fyzika pevných látek a magnetismus
Obor OECD	Condensed matter physics (including formerly solid state physics, supercond.)
CEP	GA21-06802S GA ČR - Grantová agentura ČR
	EF16_019/0000760 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
Způsob publikování	Omezený přístup
Institucionální podpora	FZU-D - RVO:68378271
UT WOS	001012582700001
EID SCOPUS	85156174823
DOI	10.1016/j.jeurceramsoc.2023.04.037
Anotace	Second harmonic generation (SHG) and high-frequency dielectric properties of Li-doped KTaO3 (K1-xLixTaO3, KLT100x) ceramics, KLT5 and KLT10, are studied in the 15-300 K temperature range. Using the resonant microwave spectroscopy at 5.8 GHz, time-domain THz spectroscopy and far-infrared reflectivity in conjunction with the dielectric properties earlier published in the 100 Hz – 100 MHz frequency range, a broad-band dielectric response of ceramics is obtained and compared with that recently published for KLT4.3 and KLT8 crystals. According to SHG, unlike in crystals, the ferroelectric phase transition temperature in both ceramics appears near 100 K. The dielectric soft mode softening is less pronounced, and the low-frequency permittivity increases less on cooling, when compared with crystals. The relaxational behavior below the microwave range is very similar and the main relaxations follow the same Arrhenius law as in the crystals.
Pracoviště	Fyzikální ústav
Kontakt	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Rok sběru	2024
Elektronická adresa	https://doi.org/10.1016/j.jeurceramsoc.2023.04.037

Počet záznamů: 1