Piezoelectric device, liquid-ejecting head, and liquid-ejecting apparatus

摘要

A piezoelectric device comprises a first electrode, a piezoelectric layer provided above the first electrode, and a second electrode provided above the piezoelectric layer. The piezoelectric layer comprises a mixed crystal containing at least bismuth ferrate and barium titanate. The piezoelectric layer comprises a first piezoelectric layer and a second piezoelectric layer which is disposed between at least one of the first and second electrodes and the first piezoelectric layer. The barium titanate content of the second piezoelectric layer is at least 10 mole percent higher than the barium titanate content of the first piezoelectric layer.