Effective magnetic field parameter anisotropy

The crystal field does, however, have a dramatic effect on the magnetic anisotropy of lanthanide complexes. For complexes of less than cubic symmetry the three principal values of the susceptibility tensor are unequal. For uniaxial symmetry, Xx — Xy Xz and for biaxial symmetry Xx Xy Xz- Very extensive studies632-640 have been carried out on the single crystal susceptibilities of the D3d lanthanide hexakis(antipyrene) triiodides over the temperature range 80-300 K, and crystal field parameters were obtained. This crystal field-induced anisotropy is responsible for the effectiveness of lanthanide complexes as NMR shift reagents, and single crystal anisotropies of lanthanide complexes have been determined in this connection also.563... 

Magnetic columns FeNi(P) concern to a class of nanostructured materials. Therefore, for interpretation of the data on the approach magnetization to saturation, the special advanced techniques should be used [1], A field of local magnetic anisotropy Ha, correlation radius of casual magnetic anisotropy Rc, a field of anisotropy, the size of the basic unit of a nanostructured magiwtic, the stochastic magnetic domain can be determined with this technique. These parameters can be associated with the GMR effect. 

---