arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1708.04562cond-mat.mtrl-sci
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用于先进多匝传感器装置的交叉结构中的可靠磁畴壁传播

Reliable magnetic domain wall propagation in cross structures for advanced multi-turn sensor devices

B. Borie, M. Voto, L. Lopez-Diaz, H. Grimm, M. Diegel, M. Kläui, R. Mattheis

摘要:

我们开发和分析了一个先进的概念畴壁为基础的旋转传感。通过旋转场移动具有n-1个交叉卷积的n个闭合环中的畴壁,我们可以感测n个旋转。通过将循环与互质旋转数相结合,我们创建了一个传感器系统,该系统允许对旋转施加的磁场的数百万圈进行总计数。我们分析了传感器的操作,并确定交叉交叉结构作为可靠操作的关键部件。特别地,取决于所施加的场角与交叉的分支中的磁化的取向,发现畴壁在不想要的方向上传播,从而在器件中产生故障和计数误差。为了克服这一限制因素,我们引入了一个专门设计的虹吸结构,以实现控制钉扎的畴壁之前的交叉和脱钉扎和传播只为选定的范围内的应用领域的角度。通过调整虹吸管和交叉的几何形状,我们发现,这两种结构的优化组合,防止故障,在整个传感器结构产生强大的操作。我们的建模结果表明,优化的元件几何形状允许实现的传感器与十字形的交叉点和操作是宽容的制造的不准确性。

英文摘要:

We develop and analyze an advanced concept for domain wall based sensing of rotations. Moving domain walls in n closed loops with n-1 intersecting convolutions by rotating fields, we can sense n rotations. By combining loops with coprime numbers of rotations, we create a sensor system allowing for the total counting of millions of turns of a rotating applied magnetic field. We analyze the operation of the sensor and identify the intersecting cross structures as the critical component for reliable operation. In particular depending on the orientation of the applied field angle with the magnetization in the branches of the cross, a domain wall is found to propagate in an unwanted direction yielding failures and counting errors in the device. To overcome this limiting factor, we introduce a specially designed syphon structure to achieve the controlled pinning of the domain wall before the cross and depinning and propagation only for a selected range of applied field angles. By adjusting the syphon and the cross geometry, we find that the optimized combination of both structures prevents failures in the full sensor structure yielding robust operation. Our modeling results show that the optimized element geometry allows for the realization of the sensor with cross-shaped intersections and operation that is tolerant to inaccuracies of the fabrication.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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