About KOYAMA Hirokatsu
About Tohoku Univ., Sendai, JPN
About NAKAMURA Kiyoshi
About Tohoku Univ., Sendai, JPN
About TAKANO Takehiro
About Tohoku Inst. of Technol., Sendai, JPN
About Journal of Applied Physics
About piezoelectric vibrator
About Z-cut
About Piezoelectricity,pyroelectricity,electret
About Acoustical properties of condensed matter in general
About 分極
About 多重
About ドメイン構造
About 拡張
About 振動子