TY - JOUR
T1 - Effects of heat treatment on electrical and electromechanical properties of hydrothermally synthesized epitaxial (K0.51Na0.49) NbO3 films
AU - Shiraishi, Takahisa
AU - Kaneko, Noriyuki
AU - Kurosawa, Minoru
AU - Uchida, Hiroshi
AU - Hirayama, Taisei
AU - Funakubo, Hiroshi
PY - 2014/5
Y1 - 2014/5
N2 - Effects of heat treatment on the electrical and electromechanical properties of hydrothermally synthesized epitaxial (K0.51Na 0.49)NbO3 films were investigated. The film composition and crystal structure did not markedly change with heat treatment from 240 to 600°C in O2 atmosphere. However, the leakage current density drastically decreased from the order of 101 to 10%5A/ cm2 at 50kV/cm after heat treatment at 240 °C. The relative dielectric constant, remanent polarization, and transverse piezoelectric constant increased with increasing heat treatment temperature from 300 to 600°C (from 330 to 750 in εr, from 5.4 to 14 μC/cm 2 in remanent polarization, and from 41 to 56pm/V in transverse piezoelectric response). H2O desorption of 12ppm was detected in epitaxial (K0.51Na0.49)NbO3 films by thermal desorption spectroscopy measurement. Such H2O desorption can be related to the improvement of the electrical and electromechanical properties of the hydrothermally synthesized epitaxial (K0.51Na 0.49)NbO3 films.
AB - Effects of heat treatment on the electrical and electromechanical properties of hydrothermally synthesized epitaxial (K0.51Na 0.49)NbO3 films were investigated. The film composition and crystal structure did not markedly change with heat treatment from 240 to 600°C in O2 atmosphere. However, the leakage current density drastically decreased from the order of 101 to 10%5A/ cm2 at 50kV/cm after heat treatment at 240 °C. The relative dielectric constant, remanent polarization, and transverse piezoelectric constant increased with increasing heat treatment temperature from 300 to 600°C (from 330 to 750 in εr, from 5.4 to 14 μC/cm 2 in remanent polarization, and from 41 to 56pm/V in transverse piezoelectric response). H2O desorption of 12ppm was detected in epitaxial (K0.51Na0.49)NbO3 films by thermal desorption spectroscopy measurement. Such H2O desorption can be related to the improvement of the electrical and electromechanical properties of the hydrothermally synthesized epitaxial (K0.51Na 0.49)NbO3 films.
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U2 - 10.7567/JJAP.53.05FE02
DO - 10.7567/JJAP.53.05FE02
M3 - Article
AN - SCOPUS:84903313885
SN - 0021-4922
VL - 53
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
IS - 5 SPEC. ISSUE 1
M1 - 05FE02
ER -