Multiple-phase evolution and electrical transport of Sr_4−xY_xCo₄O_12−δ (x = 0–1.0): an ordered phase transition process

Abstract

The transition metal oxide (TMO) SrCoO3-δ family with rich structural diversity has been widely studied in the phase transition and energy application fields. We report the multiple-phase structure evolution, phase...

Introducing gradient Er ions and oxygen defects into SrCoO3 for regulating structural, electrical and magnetic transport properties

“…When the Er content reaches 0.2, the sample exhibits a pure ordered tetragonal phase, with CoO 4.25 tetrahedral layers forming and the CoO 6 octahedra twisting, resulting in a superstructure exhibiting A-site and oxygen vacancy ordering. 35 To observe the ordered tetragonal phase transition clearly, we conducted XRD slow scans on the secondary sintered Sr 1− x Er x CoO 3− δ ( x = 0.15, 0.2, and 0.25) samples. The scans were specifically performed in the ranges of 20–21.5° and 38.5–40°.…”

“…34 The oxygen content plays a pivotal role in this system, as the absorption of oxygen triggers the ordered phase transition (1042 °C), resulting in its ferromagnetic behavior at room temperature. 35 Therefore, we strongly recommend research on doping strategies and the relevant oxygen defects within the system to facilitate its practical-scale applications.…”