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Noise of low-coercivity single-layer perpendicular recording media

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5 Author(s)
de Bie, R.W. ; Philips Research Laboratories, Eindhoven, The Netherlands ; Luitjens, S.B. ; Zieren, V. ; Schrauwen, C.P.G.
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The noise of single layer CoCr media is investigated. A model is developed by treating the medium as a collection of columns. It appears that there is a strong correlation between magnetization direction of the columns. Neighbouring columns tend to have the same magnetization polarity, indicating exchange interaction. It is concluded that the media consist of domains. The domain width increases with the medium thickness. These domains can also result in a poor signal response at short wavelength.

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Magnetics, IEEE Transactions on  (Volume:23 ,  Issue: 5 )