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Materials study demonstrates strong perpendicular magnetic anisotropy in ultrathin cobalt-platinum superlattices, highlighting their potential for gigabit-scale magnetic random-access memory.
Ultrathin [Co/Pt] n superlattice films consisting of 0.18–0.60-nm-thick Co and Pt sublayers were deposited by sputtering. A large in-plane saturation field ( H s ) of ∼39 kOe and a very large effective perpendicular magnetic anisotropy ( K eff ) with a magnitude of 10 7 erg/cm 3 were attained. The highest K eff was ∼1.40 × 10 7 erg/cm 3 . These films are promising candidates for the reference layer of the p-MgO magnetic tunnel junction in Gb-scale magnetic random-access memory.
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Liu et al. (2016) studied this question.
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