| Autor: |
Kudo, Kenichi, Kakiuchi, Kenji, Mizutani, Kouji, Hoshikawa, Keigo, Fukami, Tatsuo |
| Předmět: |
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| Zdroj: |
Ferroelectrics; 2005, Vol. 323 Issue 1, p157-164, 8p |
| Abstrakt: |
Single crystals of potassium niobate (KNbO 3 ) were grown by the vertical Bridgman method. The crystal was cut into 3 × 3 × 0.7 mm 3 plates, and dielectric constants and resonance characteristics were observed as a function of the magnitude of the electric field used in the poling treatment. With [001] pc poled crystal, which stands for [001] direction in pseudocubic crystal lattice, no large change in properties resulted even if the electric field was changed. However, with [101] pc poled crystal, a reduction in the dielectric constant, a shift to a higher resonance frequency, and an increase in the phase angle in the inductive reactance region were observed when the electric field became larger than approximately 70 V/mm. These results can be systematically explained by the relative directions of the dipole moment and the electric field, and the resulting movement. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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