Field-driven hysteretic and reversible resistive switch at the Ag–Pr0.7Ca0.3MnO3 interface

The hysteretic and reversible polarity-dependent resistive switch driven by electric pulses is studied in both ${\mathrm{Ag/Pr}}_{\text{0.7}}{\mathrm{Ca}}_{\text{0.3}}{\mathrm{MnO}}_3/{\mathrm{YBa}}_2{\mathrm{Cu}}_3{\mathrm{O}}_7$ sandwiches and single-layer ${\mathrm{Pr}}_{\text{0.7}}{\mathrm{Ca}}_{\text{0.3}}{\mathrm{MnO}}_3$ strips. The data demonstrate that the switch takes place at the ${\mathrm{Ag–Pr}}_{\text{0.7}}{\mathrm{Ca}}_{\text{0.3}}{\mathrm{MnO}}_3$ interface. A model, which describes the data well, is proposed. We further suggest that electrochemical migration is the cause for the switch.