Reversible oxygen vacancies doping in (La${}_{0.7}$,Sr${}_{0.3}$)MnO${}_3$ microbridges by combined self-heating and electromigration

Abstract

Combination of electric fields and Joule self-heating is used to change the oxygen stoichiometry and promote oxygen vacancy drift in a free-standing $(\mathrm{La},\mathrm{Sr})\mathrm{Mn}{\mathrm{O}}_3$ thin film microbridge placed in controlled atmosphere. By controlling the local oxygen vacancies concentration, we can reversibly switch our LSMO-based microbridges from metallic to insulating behavior on timescales lower than 1 s and with small applied voltages (<5 V). The strong temperature gradients given by the microbridge geometry strongly confine the motion of oxygen vacancies, limiting the modified region within the free-standing area. Multiple resistive states can be set by selected current pulses that determine different oxygen vacancies profiles within the device . Qualitative analysis of device operation is also provided with the support of Finite Element Analysis.

5 pages, 3 figures

References in corpus (1)

• Reversible oxygen vacancies doping in (La${}_{0.7}$,Sr${}_{0.3}$)MnO${}_3$ microbridges by combined self-heating and electromigration

Cited by in corpus (1)

• Reversible oxygen vacancies doping in (La${}_{0.7}$,Sr${}_{0.3}$)MnO${}_3$ microbridges by combined self-heating and electromigration