Preparation and characterization of Fully stoichiometric SrCoO₃ by electrochemical oxidation

Abstract

A nearly stoichiometric SrCoO3 phase had been prepared up to now only using high oxygen pressure. A new method for preparing fully stoichiometric SrCoO3 has been proposed using electrochemical oxidation. Brownmillerite‐type SrCoO2.50 is oxidized into a completely stoichiometric perovskite at a potential of 500 mV for 180 hours at room temperature in alkaline media (1 M KOH). The oxidized phase has a cubic unit cell (a=383.5 pm). It is metallic and, at temperatures below T=280 K, it shows ferromagnetic behavior. The magnetic moment at 0 K is 2.1 μB. The physical properties of SrCoO3.00 have been explained in terms of partial occupancy of a σ*e gα band.

Impact of niobium doping upon the magnetotransport properties of the oxygen-deficient perovskite SrCo1−xNbxO3−δ

“…3 µ B /Co [6,7]. Nevertheless, it is worth pointing out that this value is higher than for the 4 Sc-phase, 0.3 µ B /Co [9].…”

Membranes for H2 generation from nuclear powered thermochemical cycles.

“…Due to the strong electron correlation in the first row transition metal ions, this class of perovskites exhibits rich and complex structural, electronic, and magnetic behavior. (1) The end member SrCoO 3 is known to be metallic [21], with a 2.1 Bohr magneton magnetic moment per formula unit. LDA calculations qualitatively reproduce these properties [22].…”

Transition-metal-oxide based functional thin-film device using leakage-free electrolyte

“…9(b)] was 2.0¯B/Co, which is almost the same as that of bulk SCO 3 (³2.1¯B/Co). 51) On the other hand, upon the application of V g = +3 V for 3 s, the R s -and m-values recovered to the virgin state [Figs. 9(a) and 9(b), C].…”