Details

Autor(en) / Beteiligte

• Ahn, C W
• Lee, S Y
• Lee, H J
• Ullah, A
• Bae, J S
• Jeong, E D
• Choi, J S
• Park, B H
• Kim, I W

Titel

The effect of K and Na excess on the ferroelectric and piezoelectric properties of K0.5Na0.5NbO3 thin films

Ist Teil von

• Journal of physics. D, Applied physics, 2009-11, Vol.42 (21), p.215304-215304 (5)

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2009

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We have fabricated K0.5Na0.5NbO3 (KNN) thin films on Pt substrates by a chemical solution deposition method and investigated the effect of K and Na excess (0-30 mol%) on ferroelectric and piezoelectric properties of KNN thin film. It was found that with increasing K and Na excess in a precursor solution from 0 to 30 mol%, the leakage current and ferroelectric properties were strongly affected. KNN thin film synthesized by using 20 mol% K and Na excess precursor solution exhibited a low leakage current density and well saturated ferroelectric P-E hysteresis loops. Moreover, the optimized KNN thin film had good fatigue resistance and a piezoelectric constant of 40 pm V-1, which is comparable to that of polycrystalline PZT thin films.