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Approaches to reduce temperature coefficient of coercivity of high-density recording media

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3 Author(s)
Acharya, B.R. ; File Memory Lab., Fujitsu Labs. Ltd., Atsugi, Japan ; Ajan, Antony ; Okamoto, Iwao

The magnitude of temperature coefficient of coercivity (|dHC /dT|) of high-density recording media increases with decreasing media thickness and dilution of the Co in the interior of the grains by Cr or other substitutions. A reduction in magnetic anisotropy with temperature increases |dHC/dT| whereas a decrease in magnetization compensates for such change. Some approaches such as better Cr segregation, or utilizing a magnetic bilayer with the initial layer having a lower Curie temperature can be used to minimize |dHC /dT|

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Magnetics, IEEE Transactions on  (Volume:36 ,  Issue: 5 )