Journal of the Japan Society of Powder and Powder Metallurgy
Online ISSN : 1880-9014
Print ISSN : 0532-8799
ISSN-L : 0532-8799
Electro-Magnetic Devices, Magneto-Optics, & Recordings
Simulation Study of Switching Field and Its Applied Field Angle Dependence of Three-layer Exchange Coupled Composite Dots
N. HondaK. Yamakawa
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JOURNAL OPEN ACCESS

2014 Volume 61 Issue S1 Pages S346-S349

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Abstract
Proposed exchange coupled composite (ECC) magnetic dot structure consisting of three layers was studied by simulation for practical design of the magnetic recording media. Induced perpendicular anisotropy due to the layer stacking as well as the shape anisotropy of the soft layer for a square prism ECC dot was estimated. The ECC dots with the modified perpendicular anisotropy fields for the layers exhibited a minimum switching field and a flat applied field angle dependence of the switching field near perpendicular direction as expected. This would contribute to decrease write track width or increase cross track shift margin. It is concluded that consideration of the shape and layer stacking perpendicular anisotropy is indispensable for designing practical ECC dots.
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© 2014 by Japan Society of Powder and Powder Metallurgy

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