2018-Sustainable Industrial Processing Summit
SIPS2018 Volume 8. Composite, Ceramic, Nanomaterials and Mathematics

Editors:F. Kongoli, M. de Campos
Publisher:Flogen Star OUTREACH
Publication Year:2018
Pages:184 pages
ISBN:978-1-987820-96-6
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)
CD-SIPS2018_Volume1
CD shopping page

    Improved Nanocrystalline Structures for Magnetic Recording

    Marcos de Campos1; Jose Adilson de Castro1;
    1UFF - FEDERAL FLUMINENSE UNIVERSITY, Volta Redonda, Brazil;
    Type of Paper: Regular
    Id Paper: 336
    Topic: 18

    Abstract:

    This paper will discuss in detail the adequate microstructural structures for magnetic recording. The maximum coercivity is obtained for single domain size particles [1], also known as Stoner-Wohlfarth particles. It was found that the squareness of hysteresis is improved with texture optimization, which is relevant as good squareness of hysteresis is an important issue for the magnetic recording industry. Detailed overviews on the texture effects of Stoner-Wohlfarth particles, as well as the effects of particle interaction, are given and discussed in detail. Additionally, modifications of the Stoner-Wohlfarth model, and the Callen-Liu-Cullen [2] model are analyzed. The spring effect observed in hysteresis curves of isotropic nanocrystalline materials can be explained with the Stoner-Wohlfarth model. Theories for magnetostic coupling between particles are also reviewed.

    Keywords:

    Core-Shell; Nanomaterials; Nanoparticles;

    References:

    [1] S.A. Romero, M.F. de Campos, A.J. Moreira,
    F.J.G. Landgraf, The Effect of the Cu and Sm
    content on the anisotropy field of Sm(CoFeCuZr)z
    isotropic nanocrystalline alloys. In: H. Fukunaga, S.
    Sugimoto (Eds.), Proceedings of the 22th
    International Workshop on Rare- Earth Permanent
    Magnets and Their Applications, Nagasaki, Japan,
    2012, pp. 44-47.
    [2] E. Callen, Y.J. Liu and J.R. Cullen. Initial
    magnetization, remanence, and coercivity of the
    random anisotropy amorphous ferromagnet.
    Physical Review B Vol. 16 (1977), p. 263

    Full Text:

    Click here to access the Full Text

    Cite this article as:

    de Campos M and de Castro J. (2018). Improved Nanocrystalline Structures for Magnetic Recording. In F. Kongoli, M. de Campos (Eds.), Sustainable Industrial Processing Summit SIPS2018 Volume 8. Composite, Ceramic, Nanomaterials and Mathematics (pp. 45-50). Montreal, Canada: FLOGEN Star Outreach