Patent ID: 7911739
Filing Date: 2011-03-22
Classification: B82Y,G11B

Abstract:
1. A method for writing magnetization states in a multi-level patterned magnetic medium comprising a plurality of pillars distributed in an X direction and a Y direction which are orthogonal to each other and define an X-Y plane, consecutive pillars of the plurality of pillars separated by non-magnetic material, each pillar comprising a plurality of magnetic islands distributed along a Z direction orthogonal to the X-Y plane, said method comprising: selecting a magnetization state [S determining a write current (I) sufficient to write the magnetization state [S applying the write current I to a magnetic write head moving in the first direction to generate in the first magnetic island and the second magnetic island a magnetic field that exceeds a switching field of the first magnetic island and a switching field of the second magnetic island; and responsive to said applying, said magnetic write head writing the magnetization state [S