On the Relationship between Magnetic Viscosity and Coercivity of Perpendicular Media

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Lintelo te, J.G.Th. and Lodder, J.C. (1994) On the Relationship between Magnetic Viscosity and Coercivity of Perpendicular Media. Journal of Applied Physics, 76 (3). pp. 1741-1744. ISSN 0021-8979

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Abstract:The dependent and dc-demagnetization measurements were performed on two types of perpendicular thin film media, Co-Cr and Fe-alumite. From these the parameters for magnetic viscosity and irreversible susceptibility were derived. Their ratio, resulting in the fluctuation field, is shown to relate logarithmically to the coereivity. This so-called “Barbier plot for perpendicular media” is found to exhibit a slope of approximately one and a half instead of one, as is found for in-plane media. The activation volumes were also derived and related logarithmically to the coercivity. Here a slope of approximately minus one and a half was found, instead of minus 0.73 as is found for in-plane media.
Item Type:Article
Copyright:© 1994 American Institute of Physics
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/66120
Official URL:http://dx.doi.org/10.1063/1.357689
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Metis ID: 111936