paramagnetic susceptibility
1.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.
2.By means of the ZFS and EPR parameters which have been calculated by a complete configuration mixing unified crystal field theery for d~8(D4h). The low-temperature heat capacity and paramagnetic. susceptibility of the compound Ni(Pz)4 Cl2 have been calculated theoretically and uniformly.
3.The verdet constant V of diamagnetic media is independent of temperature T. The ratio of the verdet constant V9 of some paramagnetic media and their susceptibility x satisfies the relation of V9/x=G(1+ RT).
4.Quantitative Calculation of the Magnetic Susceptibility and the Verdet Constant in the Paramagnetic Medium CeF_3

