Piezoelectric element, ink jet recording head, ink jet printer, surface acoustic wave element, frequency-dependent filter, oscillator, electronic circuit, thin film piezoelectric resonator, and electronic apparatus

摘要

A piezoelectric element includes a piezoelectric material film made of BiFeO3. The piezoelectric element can be used in an ink jet recording head which includes a cavity with a variable internal volume, wherein the internal volume of the cavity changes depending on deformation of the piezoelectric material film included in the piezoelectric element.