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The current efforts to fabricate non-volatile magnetic recording media with ahigh areal density is deteriorated by the increasing temporal instability ofthe stored information. If the stored energy per magnetic particle competeswith the thermal energy, spontaneous magnetic reversal processes may occur.Deposition of the magnetic particles on top of an antiferromagnetic substratewill increase its energy barrier due to the exchange coupling between the twosubsystems. For this the magnetic moments of the antiferromagnet in thevicinity of the magnetic particle have to deviate from their undisturbedarrangement. This disturbation vanishes within a few lattice constants. In theframework of a classical spin model we calculate the spin arrangements and theresulting energy barriers for typical systems.Comment: 3 pages, 2 figure

Magnetic recording medium with improved temporal stability