Perovskite type oxide, ferroelectric film, process for producing same, ferroelectric device, and liquid discharge apparatus

摘要

In a perovskite type oxide, which is of a PZT type, doping of donor ions in a doping concentration of at least 5 mol% at an A site is enabled without a sintering auxiliary or acceptor ions being doped. The perovskite type oxide is represented by Formula (P) :

         Pb<Sub>1-x+δ</Sub>M<Sub>x</Sub>) (Zr<Sub>y</Sub>Ti<Sub>1-y</Sub>)O<Sub>z</Sub>     (P)

wherein M represents at least one kind of element selected from the group consisting of Bi and lanthanide elements, 0.05 ≤ x ≤ 0.4, and 0 < y ≤ 0.7, the standard composition being such that δ=0, and z=3, with the proviso that the value of δ and the value of z may deviate from the standard values of 0 and 3, respectively, within a range such that the perovskite structure is capable of being attained.