Method for magnetic recording on patterned multilevel perpendicular media
A magnetic recording medium, the technology of magnetic moment direction, which is applied to the recording, recording/reproducing/deleting method, magnetic recording and other directions of information on the magnetic disk, which can solve the problems of low failure rate, no patterned magnetic island, damage to SNR, etc.
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[0019] Patterned Multilayer Perpendicular Magnetic Recording Media
[0020] figure 1 is a schematic diagram of the patterned magnetic recording medium of the present invention. The medium includes a substrate 12 , a multilayer perpendicular magnetic recording layer 50 , an optional lower layer 14 and an optional protective overcoat 16 . The recording layer 50 includes a plurality of islands, such as the illustrated islands 52 , 54 , 56 , 58 , separated by gaps 60 . Each island is formed by a first layer of magnetic material 20 having perpendicular magnetic anisotropy, a second layer of magnetic material 40 having perpendicular magnetic anisotropy, and a spacer layer 30 that separates the two magnetic layers in each island. 20, 40 separate and magnetically decoupled. Thus, each island is a multilayer magnetic island having at least two stacked magnetically decoupling cells (eg cells 22, 32 in island 52). Each cell is a single magnetic domain and is separated from other ce...
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