THE SIZE DEPENDENCE OF THE THERMALLY AND MAGNETICALLY INDUCED WALL PINNING IN A Ni-Zn FERRITE

Abstract

Les différences des états magnétiquement neutres (DNS) d'un ferrite de Ni-Zn soumis à des désaimantations thermiques et magnétiques parallèles et perpendiculaires apparaissent dépendre distinctement de la taille moyenne des grains, ce qui est discuté.

Frequency dispersion model of the complex permeability of soft ferrites in the microwave frequency range

“…Particularly, average grain size and relative density play an important role in the magnetization process of polycrystalline ferrites: complex magnetic permeability increases with the average grain size and relative density. 2,3,8,9,11,[23][24][25][26][27][28][29][30][31][32][33][34][35][36][37]39 However, very few models relating magnetic permeability to microstructure have been developed in the past, and all of them have been uniquely tested at a specific constant angular frequency. In this regard, it is worth mentioning the models proposed by Globus, 36 Rikukawa, 38 Johnson and Visser, 25 and Pankert.…”