Mn2+doping-induced-effects on commensuration and incommensuration of potassium zinc chloride crystal

Autor:	A. Abu El-Fadl, A. M. Abousehly, M. M. Mostafa, M. A. Gaffar
Rok vydání:	2005
Předmět:	Chemistry Potassium Relaxation (NMR) Inorganic chemistry Evaporation Analytical chemistry chemistry.chemical_element Dielectric Zinc Conductivity Crystal General Materials Science Dielectric loss Instrumentation
Zdroj:	Phase Transitions. 78:295-315
ISSN:	1029-0338 0141-1594
DOI:	10.1080/01411590412331316942
Popis:	Undoped and Mn2+-doped with different concentrations of potassium zinc chloride (KZC) crystals were grown from aqueous solutions by slow evaporation. The dielectric constant (e), dielectric losses (tan δ) and ac conductivity (σac) of the crystals in the ferroelectric-commensurate, incommensurate and normal phases have been measured as a function of frequency, in the range 1–100 kHz, and temperature, in the range 300–580 K. Virgin samples were subjected to measurements of the frequency dependence at selected temperatures and measurements of the temperature dependence was then followed using the same samples. The increase of e with T could be due to a combination of conductivity, structural variations and discommensuration (DC) formation and pinning as well. The increase of tan δ with temperature was attributed to relaxation loss in addition to conduction loss, which increases more rapidly with temperature. The ac conductivity (σac) and tan δ along the polar axis of KZC increased significantly with increasi...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::017333893a080f06d3be1f16ab602ed3 https://doi.org/10.1080/01411590412331316942 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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