Popis: |
The reverse resistance switching is observed in polycrystalline Nb 2 O 5 film, which is one of promising candidates for nonvolatile resistance random access memory (ReRAM) devices. This reverse switching is compared with the usual behavior, in which the switching voltage V LH from low resistance (LR) to high resistance (HR) states is lower than V HL from HR to LR states. Based on these experiments, we propose a phenomenological mechanism for the resistance switching, which assumes the coexistence of LR and HR phases and the percolation transition. |