Patent ID: 7646140

Claim:
A piezoelectric element having, a piezoelectric body and a pair of electrodes which are in contact with the piezoelectric body, wherein the piezoelectric body consists of a perovskite type oxide represented by the following formula (3): (Bi,Ba)(M′,M″,Cu)O 3 (3) in which M′ is an atom of one element selected from the group consisting of Nb, Ta and W, and M″ is one or more atoms of elements selected from the group consisting of Mn, Sc, In, Ga, Yb, Al, Mg, Zn, Zr, Fe and Sn, and wherein the piezoelectric body is a piezoelectric body in which crystal phases of at least two of tetragonal structure, rhombohedral structure, pseudo-cubic structure, rhombic system and monoclinic structure are mixedly present.