On the Relationship between Magnetic Viscosity and Coercivity of Perpendicular Media

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)
Research Group:	Transducers Science and Technology (TST)
Link to this item:	http://purl.utwente.nl/publications/66120
Official URL:	http://dx.doi.org/10.1063/1.357689
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