EFFECT OF THIN KNbO3 SEED LAYERS ON PULSED LASER DEPOSITED FERROELECTRIC KTa0.65Nb0.35O3 FILMS FOR MICROWAVE TUNABLE APPLICATION

Ferroelectric KTa 0.65 Nb 0.35 O 3 thin films were grown by pulsed laser deposition on R-plane sapphire substrates. The potassium enriched ceramic targets were used for compensating potassium losses. In order to improve the KTa 0.65 Nb 0.35 O 3 film growth on sapphire, a thin KNbO 3 layer was introd...

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Published inIntegrated ferroelectrics Vol. 93; no. 1; pp. 126 - 132
Main Authors PENG, WEI, BOUQUET, VALÉRIE, DÉPUTIER, STÉPHANIE, SIMON, QUENTIN, GUILLOUX-VIRY, MARYLINE, PERRIN, ANDRÉ
Format Journal Article
LanguageEnglish
Published Taylor & Francis Group 01.09.2007
Subjects
PLD
Potassium tantalate niobate
pyrochlore phase
seed layer
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Summary:Ferroelectric KTa 0.65 Nb 0.35 O 3 thin films were grown by pulsed laser deposition on R-plane sapphire substrates. The potassium enriched ceramic targets were used for compensating potassium losses. In order to improve the KTa 0.65 Nb 0.35 O 3 film growth on sapphire, a thin KNbO 3 layer was introduced as seed layer. The experimental results show that the crystalline quality is lowered when increasing the K-excess. Simultaneously, phase purity, orientation and crystalline quality of perovskite (h00)-oriented KTa 0.65 Nb 0.35 O 3 are greatly improved by the use of the KNbO 3 seed layer. In particular, the presence of the latter effectively suppresses any pyrochlore secondary phase formation.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1058-4587
1607-8489
DOI:10.1080/10584580701756383