STUDY OF THE INFLUENCE OF SURFACE ANISOTROPY AND LATTICE STRUCTURE ON THE MAGNETIC PROPERTIES OF NANOSIZED POWDERS OF HEXAFERRITES

摘要

In the last years the behavior features of the basic magnetic properties of nanosized magnetics draw the attention of researches. Aside the well-known effects of transition into single-domain and superparamagnetic states, other magnetic effects connected with the increasing role of the surface phenomena in magnetic particles of the small size, such as: fluctuations of exchange interactions for atoms belonging to a surface and indignant surfaced a layer, change of local symmetry of a crystal field could be observed.