Local and interfacial magnetic properties of inhomogeneous finite linear chains

The Hubbard Model has been used to study the local and interfacial magnetic properties of finite inhomogeneous cluster systems. These are generally of the type, NMMMMMN, where N and M, respectively, refer to non-magnetic and magnetic atoms, of a 7-site finite chain. The applicability of the Hartree–Fock (HF) approximation is gauged via direct comparison of the ground state magnetization results derived from exact diagonalization methods. The underlying HF and exact mechanisms are compared as a function of the model parameters, with particular attention being paid to the local and interfacial (N/M interface) magnetic properties. Regimes, which exhibit favourable comparison between HF and exact results are found. Detailed inspection of the HF prediction is made and general trends established as a function of system size and model parameters.