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Micromagnetic Modeling Study of Thermal Gradient Effect in Heat-Assisted Magnetic Recording (HAMR)

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4 Author(s)
Torabi, A.F. ; Western Digital Corp., San Jose, CA, USA ; van Ek, J. ; Champion, E. ; Wang, J.

The performance of heat assisted magnetic recording (HAMR) is simulated using a multilayer micromagnetic model. Recording performance parameters such as signal-to-noise ratio (SNR) were simulated as a function of the vertical thermal gradient in the recording media. Simulation results show that the vertical thermal gradient in the media has to be higher than ( -28 deg/nm) in order to have no loss of SNR based on parameters used in the model. Curie temperature writing is also necessary in order to maximize the SNR.

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Magnetics, IEEE Transactions on  (Volume:45 ,  Issue: 10 )