Abstract
Incorporating the recent bond order-length-strength correlation mechanism [Sun; et al. J. Phys. Chem. B 2002, 106, 10701] into the Ising premise has led to consistent insight, with an analytical expression, into the Curietemperature (Tc) suppression of ferromagnetic, ferroelectric, and superconductive nanosolids. The phase stability is related to the atomic cohesive/exchange energy that is lowered by the coordination number (CN) imperfection of the lower coordinated atoms near the surface edge. A numerical match between predictions and measurements for a number of specimens reveals that the short spin-spin correlation dominates the exchange interaction in the ferromagnetic Fe, Co, Ni, and Fe 3 O 2 nanosolids, whereas the long-range interaction dominates the exchange energy for the ferroelectric PbTiO 3 , PbZrO 3 , SrBi 2 Ta 2 O 9 , and BaTiO 3 and the superconductive MgB 2 nanosolids.
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