Incoherently-reversing magnetic laminate with exchange...

Details Incoherently-reversing magnetic laminate with exchange... Incoherently-reversing magnetic laminate with exchange...

2005-02-04

2008-09-16

Bernatz, Kevin M (Department: 1794)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

C428S829000, C428S830000, C428S216000, C360S131000

Reexamination Certificate

active

07425377

ABSTRACT:
A laminate structure is disclosed comprising multiple ferromagnetic layers achieving incoherent reversal while maintaining good SNR. A high magnetic moment density, low anisotropy field material may form a thin overlayer deposited over a high-anisotropy media layer. The media layer may have a lower magnetic moment density than the overlayer and have decoupled magnetic grains. A coupling layer may be interposed between the overlayer and the media layer to modulate the exchange there between, thereby reducing the pass-through of noise while still promoting incoherent reversal to achieve reduced write energy requirements.

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