Composite media for perpendicular magnetic recording

  title={Composite media for perpendicular magnetic recording},
  author={Randall H. Victora and Xiao Shen},
  journal={IEEE Transactions on Magnetics},
A composite perpendicular recording media consisting of magnetically hard and soft regions within each grain is proposed. Application of applied field initially causes the magnetization of the soft region to rotate and, thus, change the angle of the effective field applied to the hard region. This important change in the effective field is enabled by an exchange layer that moderates the interaction between the two regions. Energy arguments show that the resulting performance (as measured by the… 
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