1. Introduction -- 2. Spin-state crossover -- 3. Li ion battery -- 4. Huge thermoelectric power -- 5. Room-temperature ferromagnetism -- 6. Partially disordered antiferromagnetic transition -- 7. Superconductivity -- 8. Transport properties combined with charge, spin, and orbital : magnetoresistance and spin blockade -- 9. Intrinsic inhomogeneity -- 10. Move/diffuse and charge/discharge effect.