Electron microscopic observation of as-grown composition modulations in some optical oxide single crystals

Autor:	L. Malicskó
Rok vydání:	1993
Předmět:	Materials science Dopant Doping Lithium niobate Analytical chemistry Oxide Mineralogy Bismuth germanate chemistry.chemical_compound chemistry Tungstate Impurity General Materials Science Tellurium dioxide Instrumentation
Zdroj:	Phase Transitions. 43:193-196
ISSN:	1029-0338 0141-1594
DOI:	10.1080/01411599308207819
Popis:	In undoped and doped bismuth germanate, tellurium dioxide, zinc tungstate and lithium niobate single crystals grown from melts of congruent compositions as-grown, impurity-induced composition modulation of wavelengths between 1.5 and 225 nm could be observed by electron microscopy. A detailed study of Ti-and/or Mg-doped lithium niobate samples of different dopant concentrations showed that over a critical Ti concentration of about 0.25 mM/M the composition modulations extend from the microscopic to macroscopic dimensions of the crystals.
Databáze:	OpenAIRE
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