Gas-Sensing Characteristics of SrFeO3−δ Thin Film Probed by a Homemade Apparatus

Electronic Transport and Resistive Switching Properties in Topotactic SrFe1–xCoxO2.5 Devices

“…The maximum conductivity observed for the lowest Co-doped SFCO device was comparable to the conductivity of the reported SFO device ( x = 0), as shown in the inset of Figure a. Here, an increasing trend in the set–reset voltage was also observed with increasing Co content of SFCO devices due to nonuniform CF formation, which is more likely to occur in SCO-based switches. , Both SFCO devices were able to switch >100 cycles without degradation of switching characteristics, validating the stable performance of the devices (Figure b,c). However, random CF formation led to a multifilamentary set state (MFS) at intermediate cycles of the highest Co-doped SFCO film ( x = 0.66) (Figure a).…”

“…Strontium ferrite, strontium cobaltate, and their solid solutions have recently gained great attention among researchers owing to the highly reversible, redox-based topotactic phase transition (TPT) between the insulating brownmillerite (BM) and conductive perovskite (PV) phases, providing a novel platform for the development of high-quality resistive random access memory (RRAM) devices. − Additionally, Sr­(Fe/Co)­O 2.5 compounds are widely utilized in oxygen ion migration-based devices, such as fuel cells, − oxygen senores, − magnetic storage, and oxygen catalysts − due to the presence of oxygen vacancy channels (OVCs) in the crystal structure. We recently introduced SrCoO x (SCO) as a memristive material based on a TPT-driven resistive switching mechanism .…”