effective susceptibility
1.The results indicate that the complex exhibits very strong NLO absorption and strong self-focusing effect. The third-order NLO absorptive coefficient α 2, refractive index n 2 and effective susceptibility χ (3) are 1.92×10 -9 m·W -1, 9.52×10 -19 m 2·W -1 and 1.21×10 -12 esu, respectively.
2.The spinon-holon effective Hamiltonian proposed by Zou and Anderson isused to calculate the dynamic susceptibility.
3.Effective dielectric response of ellipsoid composites in which the dielectric function of the grains have the form of (the equation is abbreviated)) embedded in a host medium is investigated in dilute limit based on perturbative expansion method, and general expressions for the effective linear dielectric function and (β-1)-order nonlinear susceptibility of the two-phase system are derived in this paper.
4.By means of the effective-field livery (EFT)we study the properties of the anisotropic Ising ferromagnet with an applied transverse field on a square lattice. The relation between the critical transverse field, transverse susceptibility, paramagnetic susceptibility, magnetization and the anisotropic parameter of the exchange interaction is calculated and analysed.
5.Within the framework of the TIM (transverse field model), using the EFT (effective field theory) and the MFT (mean field theory), considering the long-range effects and the interfacial effect, we studied the transition properties of the ferroelectric thin film, pyroelectric coefficient and dielectric susceptibility and triple hysteresis loop of the ferroelectric bilayer structure theoretically.

