| abstract |
A piezoelectric layer can be uniformly formed in the in-plane direction on a substrate having a large area, and can be preferentially oriented in a (100) plane, and crystallized regardless of the state of the underlying layer. A piezoelectric element and a piezoelectric element application device capable of suppressing the deterioration of piezoelectric characteristics by maintaining the orientation of the piezoelectric element are provided. A piezoelectric element includes a first electrode, a second electrode, a piezoelectric layer disposed between the first electrode and the second electrode, a first electrode, and a piezoelectric body. An orientation control layer 73 disposed between the layer 70 and the orientation control layer 73 containing potassium, sodium, calcium, and niobium, and comprising crystals of a perovskite complex oxide preferentially oriented in the (100) plane. Including. [Selection] Figure 8 |