| 摘要 |
PROBLEM TO BE SOLVED: To provide a piezoelectric element in which crystal near a piezoelectric layer and interfaces of electrodes holding the piezoelectric layer has good quality and which has excellent piezoelectric properties.SOLUTION: A piezoelectric element 100 comprises: a first conductive layer 10; a second conductive layer 20 arranged opposite to the first conductive layer 10; and a piezoelectric layer 30 disposed between the first conductive layer 10 and the second conductive layer 20 and formed of composite oxide containing at least lead, zirconium, titanium, and oxygen. The piezoelectric layer 30 has a lead concentration gradient region 32 where concentration of lead increases from a side of the first conductive layer 10 to a side of the second conductive layer 20, and the lead concentration gradient region 32 is disposed on an end of the piezoelectric layer 30 on the side of the first conductive layer 10. |
