Engineering oxide resistive switching materials for memristive device application

Based on a unified physical model and first-principle calculations, a material-oriented methodology has been proposed to control the bipolar switching behavior of an oxide-based resistive random access memory (RRAM) cell. According to the material-oriented methodology, the oxide-based RRAM cell can be designed by material engineering to achieve the required device performance. In this article, a Gd-doped HfO₂ RRAM cell with excellent bipolar switching characteristics is developed to meet the requirements of memristive device application. The typical memristive characteristics of the Gd-doped HfO₂ RRAM cell are presented, and the mechanism is discussed.