ジルコンチタン酸鉛圧電セラミックスにおける非線形定数の直流バイアス依存性

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  • Direct Current-Bias Dependence of Nonlinear Coefficients in Lead Zirconate Titanate Piezoelectric Ceramics

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In order to clarify the occurrence mechanism of nonlinear phenomena, dc-bias dependence and aging characteristics of the nonlinear coefficients of second-higher and third-higher terms were measured in piezoelectric rectangular vibrators. The two nonlinear coefficients of second- and third-higher terms were contrasted sharply in their dc-bias dependence and aging characteristics. These contrasting dependences originate from the difference in the occurrence mechanism of harmonic voltages, that determines the values of the second- and third-higher nonlinear coefficients. The difference in the occurrence mechanism was discussed from the viewpoint of non-180° domain-wall motion.<br>

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