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Understanding write equalization in high density tape recording

A self-consistent recording simulator combined with a micromagnetic MR head model is developed to study write equalization in tape recording. The simulation study presented in this paper focuses on the understanding of the magnetization configurations resulted from write equalization and the impact on the write and read nonlinearity. It is found that the write equalization process results in a demagnetized state in otherwise saturated regions. The model analysis combined with an EPR4 channel demonstrates how both write and read linearity of the system are improved.