Magnetic Domain Structure in NiZn Ferrite Visualized by Photoemission Electron Microscope

Abstract

NiZn ferrite with the different grain sizes has been characterized by Photoemission Electron Microscope (PEEM) measurements and the magnetic domain has been successfully visualized. Small grain induces small magnetic domain and it becomes larger when the grain is large. From these measurements, the domain wall across the grain boundary has been confirmed regardless of the grain size. This result suggests the possibility of the magnetic coupling between the grains providing a new knowledge about the effect of the micro-structure on the magnetic domain structure and the magnetization in NiZn ferrite.