Influence of the oxygen content on the magnetic and transport properties of the La0.45Ba0.55CoO3–x cobaltites

Effect of Gd and Sr Ordering in A Sites of Doped Gd0.2Sr0.8CoO3−δ Perovskite on Its Structural, Magnetic, and Thermodynamic Properties

“…The estimation of the oxygen non-stoichiometry has been carried out in several publications [10][11][12] , and its effect on the cobaltate properties has been studied by several groups. [13][14][15][16][17][18] A variable magnetic state stability in cobaltates depends not only on the degree of oxygen nonstoichiometry; the ordering of cations in the A-sites also has an important impact. The uncontrolled state of cationic distribution may be the reason of rather large discrepancies in the magnetic susceptibility of the Re 1-x M x CoO 3-δ reported by different researchers.…”

“…Substituted rare-earth perovskites Re 1– x M x CoO 3−δ (where Re is the rare-earth element, and M is the alkaline-earth metal) belong to the large class of compounds with strong electron correlations (SEC) where complicated interplay of spin, charge, orbital, and lattice degrees of freedom takes place. − Physical and chemical properties of these compounds strongly depend on the composition and the doping level x , − as well as on the oxygen concentration. The estimation of the oxygen nonstoichiometry has been carried out in several publications, − and its effect on the cobaltate properties has been studied by several groups. − A variable magnetic state stability in cobaltates depends not only on the degree of oxygen nonstoichiometry; the ordering of cations in the A -sites also has an important impact. The uncontrolled state of cationic distribution may be the reason for rather large discrepancies in the magnetic susceptibility of the Re 1– x M x CoO 3−δ reported by different researchers.…”

Effect of A -site cation ordering on the thermoelectric properties of the complex cobalt oxides Gd 1-x Sr x CoO 3-δ ( x = 0.8 and 0.9)

“…These materials are interesting for fundamental research and attract close attention by the diversity of possible iso-and heterovalent substitutions and the potential of synthesizing compounds with the desired physicochemical properties for application in various sensors, solid oxide fuel cells, catalysts, thermoelectric and cathode materials, etc. [1][2][3][4][5][6][7][8] The physical properties of these compounds have been discussed in a great number of experimental and theoretical works [9][10][11][12][13][14][15][16].…”