Low-temperature dielectric behavior of disordered and ordered langasite family single crystals LGS, LGT, SNGS and STGS

Autor:	E. Smirnova, A. Sotnikov, S. Sakharov, Manfred Weihnacht, Hagen Schmidt
Rok vydání:	2015
Předmět:	Materials science Condensed matter physics business.industry Dielectric permittivity chemistry.chemical_element General Chemistry Dielectric Crystal structure Condensed Matter Physics Optics chemistry General Materials Science business Electronic materials Helium
Zdroj:	Journal of Physics and Chemistry of Solids. 85:91-95
ISSN:	0022-3697
DOI:	10.1016/j.jpcs.2015.05.014
Popis:	Dielectric measurements of disordered La 3 Ga 5 SiO 14 (LGS), La 3 Ga 5,5 Ta 0,5 O 14 (LGT) and ordered Sr 3 NbGa 3 Si 2 O 14 (SNGS), Sr 3 TaGa 3 Si 2 O 14 (STGS) single crystals of the langasite family performed at frequencies from 10 Hz to 1 MHz at temperatures between 4.2 and 300 K are reported. Temperature dependences of dielectric permittivity e 33 and e 11 are obtained. It is shown that e 33 in LGS and LGT exhibits incipient ferroelectric-like behavior. SNGS and STGS demonstrate ordinary dielectric temperature dependences as dielectric permittivity decreases down to helium temperatures.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c6883aa05eea6686de900dfb3039baaf https://doi.org/10.1016/j.jpcs.2015.05.014 Zobrazit plný text záznamu Full Text from ScienceDirect