Magnetic interactions in Fe-Ba hexaferrite nanocomposite materials

Abstract

Results are presented on the hysteretic behavior of Fe-rich, composite Ba hexaferrite-Fe samples prepared by ball milling. The most remarkable feature of these samples was the observation of loops which were displaced in the negative sense of the field axis. Similar to this, the field evolution of the isothermal and the demagnetization remanences evidenced the achievement upon the application of 8 kOe fields of nonequivalent values of both quantities. Our results are discussed considering the different magnetic hardness of the two phases forming the sample and the occurrence of interphase (dipolar) interactions. © 1998 American Institute of Physics.