合成アンチフェロマグネットの高速電流誘発スキルミオン運動
Van Tuong Pham1,2, Naveen Sisodia1,3, Ilaria Di Manici1
1Université Grenoble Alpes, CNRS, CEA, SPINTEC, 38054 Grenoble, France.
Science (New York, N.Y.)
|April 18, 2024
まとめ
研究者は,補償された合成アンチフェロマグネットを使用して,より速い磁気スキルミオン (トポロジカル磁気構造) の操作を達成しました. この方法はスキルミオン・ホール効果を克服し,潜在的メモリおよび論理デバイスの速度を最大900m/sまで可能にします.
科学分野:
- 凝縮物質物理学
- 材料科学
- ナノテクノロジー
背景:
- 磁気スキルミオンはナノスケールで 記憶や論理装置の 伝達器として有望です
- 以前の研究では,室温のスキルミオンが示されましたが,その速度は ~100 m/sに制限されました.
- トポロジカルチャージによる スキルミオン・ホール効果は 制御された操作を妨げます
研究 の 目的:
- 磁気スキルミオン速度を増やす方法を調査する
- スキルミオン・ホール・エフェクトによる 制限を克服するために
- スキルミオン操作のための 補償された合成アンチフェロマグネットの可能性を 探るためだ
主な方法:
- 補償された合成反鉄磁石を使って 磁気スキルミオンを宿す
- スキルミオンダイナミクスを観察するために,電流誘発操作を適用します.
- スキルミオンの動きと速度を分析する
主要な成果:
- 磁気スキルミオンの速度は 900m/sに達した. 過去の記録より大幅に増加した.
- スキルミオンが 流れの方向で動いている
- スキルミオン・ホール効果の消失は, 純トポロジカルチャージのキャンセルによる.
結論:
- 補償された合成アンチフェロマグネットは,磁気スキルミオンの高効率で迅速な操作を可能にします.
- トポロジカルチャージの解消はスキーミオン・ホール効果を効果的に抑制する.
- この突破は スキルミオンダイナミクスを利用する 先進的な論理とメモリ装置の道を開く.
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