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Synthesis of Highly Oriented K(Ta,Nb)O 3 (Ta:Nb = 65:35) Film Using Metal Alkoxides
Author(s) -
Yogo Toshinobu,
Kikuta Koichi,
Ito Yasuhiro,
Hirano Shinichi
Publication year - 1995
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1995.tb08632.x
Subject(s) - materials science , alkoxide , coercivity , tantalum , perovskite (structure) , metal , thin film , analytical chemistry (journal) , crystallography , chemistry , catalysis , nanotechnology , metallurgy , chromatography , condensed matter physics , biochemistry , physics
Highly oriented K(Ta,Nb)O 3 (Ta:Nb = 65:35) (KTN) thin films of perovskite structure were synthesized successfully on Pt(100)/MgO(100) substrates from a metal alkoxide solution through reaction control. Homogeneous KTN coating solutions prepared from KOC 2 H 5 , Ta(OC 2 H 5 ) 5 , and Nb(OC 2 H 5 ) 5 in ethanol were analyzed by 1 H, 13 C, and 93 Nb NMR spectroscopy. The KTN precursor included a molecular‐level mixture of K[M(OC 2 H 5 ) 6 ] (M = Ta, Nb) units interacting in ethanol solution. X‐ray pole figure measurement showed that perovskite KTN films crystallized on Pt(100)/MgO(100) substrates had not only a (100) orientation but also a three‐dimensional regularity of grains. The remanent polarization and coercive field of the KTN film (thickness, 1.0 μm) crystallized at 700°C were 1.5 μC/cm 2 and 8.7 kV/cm, respectively, at 225 K.