Patent ID: 8129043
Filing Date: 2012-03-06
Classification: B82Y,G11B

Abstract:
1. A system for strain-assisted recording for controlling a reversal mechanism and tightening a switching field distribution in non-continuous, bit patterned media, comprising: a seed layer having a soft underlayer (SUL); a buffer layer on the seed layer; a pair of strain-inducing layers (SIL) comprising a shape memory alloy; a magnetic media layer (ML) between the pair of SIL, the ML having a uniaxial anisotropy, the ML comprises at least one transition metal selected from the group consisting of Co, Fe and Ni, at least one 5d metal selected from the group consisting of Pt and Pd, at least one rare earth metal selected from the group consisting of Tb, Dy and Sm, at least one segregant selected from the group consisting of B, Cr, SiO a cap layer on the ML; the SIL induces a strain on the ML, such that a structural change applied to the ML generates a rotation or an amplitude variation of an anisotropy of the ML; wherein the system comprises a non-continuous, bit patterned media.