記録媒体での磁壁ピン止めシミュレーション(記録システムおよび一般)

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  • Micromagnetic Simulations of Domain Wall Pinning in Recording Media

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Using a micro-magnetic model, cluster-pinned recording media consisting of clusters exchange-coupled to a continuous hard layer were modeled to investigate their suitability for high density data storage. The pinning field due to the clusters was determined by modeling domain-wall motion in the continuous layer. Larger clusters, a thinner continuous layer and increased saturation magnetization of the clusters all increased the pinning field. Different shapes of clusters had no effect on pinning field. Varying the cluster density, whilst maintaining the total surface area, significantly increased the pinning field once the cluster density dropped below a certain level. Simulations of recording demonstrated the feasibility of using domain wall pinning to control the written bit size in continuous media.

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