Rolled-up architectures for magnetic racetrack memory applications

用于磁性赛道存储器应用的卷绕架构

• 批准号: 209626993
• 负责人: Dr. Denys Makarov
• 金额: --
• 依托单位: Institut für Ionenstrahlphysik und Materialforschung
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/209626993?language=en
• 关键词: Rolled; up; architectures; magnetic; racetrack

Novel properties originating from the combination of magnetism with a reduced dimensionality are of considerable interest for fundamental science but are also of potential interest in technological applications. In this project, we aim to study the effect of curvature of the cylindrical surface on the types of magnetic domain walls as well as their dynamics in thin magnetic films with in-plane and out-of-plane easy axis of magnetization. For this purpose, two systems will be investigated: (i) magnetic films grown onto curved surfaces of nonmagnetic rolled-up tubes of different length and diameter and (ii) ferromagnetic films rolledup in a tubular geometry. The effect of curvature is expected to result in a substantial modification of the magnetization reversal behavior compared to the films grown on planar substrates. The ultimate goal is to determine the velocity of the magnetic domain walls, which is a crucial parameter for applicability of the considered system in a magnetic storage scheme known as “racetrack memory”. Therefore, investigation of field- and current-driven propagation of magnetic domain walls will be performed and correlated to the curvature of the rolled-up tubes. As a layer with an in-plane magnetic easy axis, Fe19Ni81 alloy films with excellent soft magnetic properties will be employed. Furthermore, Co/Pt multilayer stacks were chosen as a system with out-of-plane magnetic easy axis.

由磁性和降维相结合而产生的新性质不仅对基础科学很有兴趣，而且在技术应用方面也有潜在的兴趣。在本项目中，我们旨在研究具有面内和平面外易磁化轴的薄膜中，柱面曲率对磁畴壁类型及其动力学的影响。为此，将研究两个系统：(I)在不同长度和直径的非磁性卷起管的曲面上生长的磁性薄膜和(Ii)以管状几何形状卷起的铁磁性薄膜。与平面衬底上生长的薄膜相比，曲率效应有望导致磁化反转行为的实质性改变。最终目标是确定磁畴壁的速度，这是所考虑的系统在被称为“赛道存储器”的磁存储方案中的适用性的关键参数。因此，将研究磁场和电流驱动的磁畴壁的传播，并将其与卷起的管的曲率相关联。Fe19Ni81合金薄膜具有良好的软磁性能，是一种具有面内易磁轴的膜层。在此基础上，选择Co/Pt多层叠层作为离面磁易轴的体系。

项目成果

Magnetoresistance of rolled-up Fe3Si nanomembranes

卷绕的 Fe3Si 纳米膜的磁阻

• DOI: 10.1088/0957-4484/23/25/255701
• 发表时间: 2012
• 期刊: Nanotechnology
• 影响因子: 3.5
• 作者: J. Schumann;K. G. Lisunov;W. Escoffier;B. Raquet;J. M. Broto;E. Arushanov;I. Mönch;D. Makarov;C. Deneke;O. G. Schmidt
• 通讯作者: O. G. Schmidt