The magnetic coupling in manganese-based dinuclear superhalogens and their analogues. A theoretical characterization from a combined DFT and BS study
文献情報
Jianli Li, Hongcun Bai, Zhenyi Jiang, Yuanhe Huang
The structures, relative stabilities, vertical detachment energies and magnetic coupling properties of a series of manganese-based dinuclear superhalogens and their isoelectronic analogues are explored via a combined density functional theory and broken symmetry study. Both the capabilities of various exchange–correlation functionals and basis set effects are investigated. The large magnitudes of the calculated exchange coupling constants indicate clearly the apparent molecular magnetism of these new types of superhalogen. Encouragingly, the high possibility of the coexistence of both high stability and strong magnetic coupling in these new polynuclear superhalogens is also confirmed. Besides these, the larger magnitudes of the calculated coupling constants of iron-based clusters here, compared with the homodinuclear [Mn2Cl5]−cluster, demonstrate the possibility of the existence of strong magnetic coupling in potential iron-based homo- and heterodinuclear superhalogens. The analysis of spin density distribution is also performed in order to understand the coupling mechanisms.
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