In this paper, La-incorporated with HfO2 thin films increase crystallization temperature which of thin films is observed from X-ray diffraction (XRD). By nano-Auger analysis, the results show that the Hf atom out-diffusion into Si substrate is increased when the La dopant in the upper layer. The out-diffusion of Hf also affects the thickness of silicate. It is suggested to be the origin of leakage current. The physical and electrical properties of different positions of La were measured and compared in this work.