Huge dielectric constant of Rb2CdI4and K2ZnI4crystals grown by Czochralski method

Autor:	Toshihisa Yamaguchi, M. Takashige, S. Gotou, Fuminao Shimizu
Rok vydání:	2011
Předmět:	Dc field Materials science Condensed matter physics business.industry Dielectric dispersion Dielectric Ferroelectricity Pyroelectricity Spontaneous polarization Optics Czochralski method Curie temperature General Materials Science business Instrumentation
Zdroj:	Phase Transitions. 84:865-871
ISSN:	1029-0338 0141-1594
DOI:	10.1080/01411594.2011.558305
Popis:	Temperature and frequency dependences of the dielectric constant and the spontaneous polarization were measured for crystals of Rb2CdI4 and K2ZnI4 obtained by the Czochralski method. The dielectric constant of both crystals shows a huge sharp peak just below the Curie point T C and the peak value is 57,000 at T C = 210.3 K of Rb2CdI4 and 27,000 at T C = 272.5 K of K2ZnI4. Below T C, it shows a shoulder-like dielectric dispersion, which is connected to ferroelectric domain motions. The spontaneous polarization of K2ZnI4 was measured by the pyroelectric method and is about 3.9 × 10–2 C m−2 at 4 K. The effects of dc field application on the dielectric properties are also discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::837ceac1e1c5411be392de55f95ceaae https://doi.org/10.1080/01411594.2011.558305 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
Nepřihlášeným uživatelům se plný text nezobrazuje	K zobrazení výsledku je třeba se přihlásit.