科学技術創成研究院フロンティア材料研究所東正樹教授、松田雅昌特定教授(Neutron Scattering Division, Oak Ridge National Laboratory)との共著論文
“Stabilized Charge, Spin, and Orbital Ordering by the 6s² Lone Pair in Bi_0.5Pb_0.5MnO₃“
が、ACS Publicationsに掲載されました。doi.org/10.1021/acs.inorgchem.0c01748

<Abstract>
Bi and Pb ions with charge degree of freedom depending on 6s ² and 6s ⁰ electronic configurations were combined with the Mn ion in a perovskite oxide. Comprehensive theoretical and experimental investigations revealed the Bi³⁺ _0.5Pb²⁺ _0.5Mn³⁺ _0.5Mn⁴⁺ _0.5O₃ charge ordered state with CE-type spin and dz ² orbital orderings as observed in La_0.5Ca_0.5MnO₃, Nd_0.5Sr_0.5MnO₃, and Bi_0.5Sr_0.5MnO₃. The charge and orbital orderings were preserved above 500 K owing to the stereochemical activity of Bi³⁺ and Pb²⁺ ions which stabilized the structural distortion.