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Synthesis and characterization of Fe-doped LiNbO3 nanocrystals from a triple-alkoxide method

✍ Scribed by Knabe, Bastian ;Schütze, Daniel ;Jungk, Tobias ;Svete, Matthias ;Assenmacher, Wilfried ;Mader, Werner ;Buse, Karsten

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
461 KB
Volume
208
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

Nanocrystals of Fe/LiNbO~3~ were synthesized from Li(OC~2~H~5~), Nb(OC~2~H~5~)~5~, and Fe(OC~2~H~5~)~3~ using a triple alkoxide sol–gel method with Fe‐dopings of 0.5 and 1 mol%, respectively. X‐ray diffraction proves the samples to be phase‐pure and crystalline. The size of the crystals as determined by Scherrer equation and transmission electron microscopy is below 50 nm. Iron is distributed homogeneously within the crystals as shown with energy‐dispersive X‐ray spectroscopy. Ferroelectricity is verified by piezoresponse force microscopy. Vacuum annealing enables to control the Fe^2+^/Fe^3+^‐concentration ratio from 0.1 to 0.9 with a reduction onset temperature of 200 °C.

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