Work

Anisotropic exchange coupling interaction between hard–hard magnetic grains in sintered SrFe 12O 19 ferrites

Year: 2023

Type: article

Abstract: The exchange coupling interaction in sintered magnetic materials is generally isotropic. In this study, an anisotropic exchange coupling interaction was found in the sintered oblate cylindrical SrFe12O19 specimens obtained by using SrFe12O19 nanopowders synthesized via a hydrothermal method. According to the Henkel plots, the exchange coupling interaction between hard-hard magnetic grains was found in both the as-pressed and the sintered specimens. However, the exchange coupling interaction can only be found in the in-plane but not in the out-of-plane direction for the sintered specimens. Through building a model of grain configuration, this anisotropy of exchange coupling interaction was ascribed to the vertically arranged plate-like SrFe12O19 grains with micrometers in width but nanometers in thickness, which was confirmed by the morphology of cross section in the fractured specimens.

Source: Journal of Advanced Ceramics

DOI: 10.26599/jac.2023.9220722