In GdMn1-xCrxO3, Cr doping suppresses Jahn-Teller distortion and orbital ordering above x≈0.35, where magnetization reversal appears, and DFT finds FM Mn layers coupled to AFM Cr layers at x=0.5.
In contrast to Mn 3+, Cr 3+ is JT inactive ion because of having completely empty eg orbitals and therefore the oxygen octahedra are more regular
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Site-substitution in GdMnO3 : effects on structural, electronic and magnetic properties
In GdMn1-xCrxO3, Cr doping suppresses Jahn-Teller distortion and orbital ordering above x≈0.35, where magnetization reversal appears, and DFT finds FM Mn layers coupled to AFM Cr layers at x=0.5.