Possible magnetic ground state in the perovskiteSrCoO3

Crystal structure and magnetic properties of high-oxygen pressure annealed Sr1−xLaxCo0.5Fe0.5O3−δ (0⩽x⩽0.5)

“…Nearly stoichiometric SrCoO 3Àd is also metallic and possesses ferromagnetic properties below T C ¼ 222 K [45,46] or, in case of the electrochemically oxidized sample, T C ¼ 280 K [28]. Co 4+ cations are reported to be either in the low [28,47] or intermediate-spin (IS) state [48,49]. Negative charge transfer was also observed in this material [50].…”

Revisiting the zero-temperature phase diagram of stoichiometric SrCoO3 with first-principles methods

“…Intermediate spin state and the choice of U There is strong experimental and theoretical evidence showing that bulk SCO possesses an intermediate spin (IS) state resulting from a competition between intraatomic exchange interactions and the crystal field [18][19][20][21]. This IS configuration can be understood as a high spin state in the Co 3+ ions that is antiferromagnetically coupled to a ligand hole of e g symmetry, which can be formally represented with the d-orbital occupation model t 4 2g e 1 g (see Fig.…”

Structural and magnetic properties of high-pressure/high-temperature synthesized (Sr1–xRx)CoO3 (R=Y and Ho) perovskites

“…Since then, various results have been reported and most of them have supported that the Co 4+ ion is in the LS state [6][7][8][9][10][11]. Recently, however, several groups suggested the possibility of IS state for Co 4+ [12,13].…”