Piezoelectric layer, piezoelectric component, piezoelectric actuator, piezoelectric sensor, hard-disk drive and ink jet printer

A piezoelectric layer composed of potassium sodium niobate which is a perovskite type compound represented by the formula ABO3,

• wherein, in the Raman spectroscopy measurement of the piezoelectric layer which is performed while the piezoelectric layer is rotated in an in-plane direction, a measured intensity of a lattice vibration region of the perovskite type compound in a Raman spectrum obtained in polarized Raman spectroscopy measurement (yx) has a periodicity of approximately 90°,
• the polarized Raman spectroscopy measurement (yx) is performed while the piezoelectric layer is rotated in the in-plane direction and Raman scattering light is polarized in a direction perpendicular to that of the incident light, and
• a crystal lattice in the piezoelectric layer is matched in a plane direction.