The grain boundary influence on the coercivity of polycrystalline MnZn-ferrites

Autor:	C. Bordel, H.J. de Wit, Jacobus Josephus Maria Ruigrok, M.T. Johnson, P. J. van der Zaag
Rok vydání:	1994
Předmět:	Materials science Condensed matter physics Grain boundary diffusion coefficient Grain boundary Crystallite Coercivity Condensed Matter Physics Anisotropy Microstructure Grain size Electronic Optical and Magnetic Materials Grain boundary strengthening
Zdroj:	Journal of Magnetism and Magnetic Materials. 129:L137-L140
ISSN:	0304-8853
DOI:	10.1016/0304-8853(94)90103-1
Popis:	A study of the microstructural influence on the coercive field of polycrystalline MnZn-ferrites is presented. The coercive field, HC, is found to depend on the grain size D as HC α D-1. This dependence can be accounted for by assuming a grain boundary with unit permeability, which also accounts for the influence of the grain size on the initial permeability of the same MnZn-ferrites. The influence of this grain boundary may explain why HC exceeds the magneto-crystalline anisotropy field Hk by an order of magnitude for some of the ferrites studied.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::68c5d92ff10981e6f826126c81da8d8c https://doi.org/10.1016/0304-8853(94)90103-1 Zobrazit plný text záznamu