arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1302.7307cond-mat.mes-hall
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单金刚石自旋磁涡旋的杂散场成像

Stray-field imaging of magnetic vortices with a single diamond spin

L. Rondin, J. P. Tetienne, S. Rohart, A. Thiaville, T. Hingant, P. Spinicelli, J. -F. Roch, V. Jacques

摘要:

尽管在磁成像方面取得了数十年的进展,但以纳米尺度的空间分辨率获得直接的定量信息仍然是一个突出的挑战。最近,出现了一种新的技术,利用金刚石中的单个氮空位(NV)缺陷作为原子大小的磁力计。虽然NV磁测量法在磁成像方面有重大进展,但该技术在应用于现实的磁性纳米结构时的有效性仍有待证明。在这里,我们使用扫描NV磁力计对磁涡旋进行成像,由于涡旋核心的尺寸很小(约10 nm),磁涡旋是纳米磁性中最具标志性的对象之一。我们报告的杂散磁场的三维,矢量和定量测量的涡流发射的铁磁方点,包括检测的涡核。我们发现良好的协议与微磁模拟,无论是规则的涡旋结构和高阶磁化状态。这些实验建立了扫描NV磁强计作为一个实用的和独特的工具,在纳米磁学的基础研究。

英文摘要:

Despite decades of advances in magnetic imaging, obtaining direct, quantitative information with nanometer scale spatial resolution remains an outstanding challenge. Recently, a new technique has emerged that employs a single nitrogen-vacancy (NV) defect in diamond as an atomic-size magnetometer. Although NV magnetometry promises significant advances in magnetic imaging, the effectiveness of the technique, when applied to realistic magnetic nanostructures, remains to be demonstrated. Here we use a scanning NV magnetometer to image a magnetic vortex, which is one of the most iconic object of nanomagnetism, owing to the small size (~10 nm) of the vortex core. We report three-dimensional, vectorial, and quantitative measurements of the stray magnetic field emitted by a vortex in a ferromagnetic square dot, including the detection of the vortex core. We find excellent agreement with micromagnetic simulations, both for regular vortex structures and for higher-order magnetization states. These experiments establish scanning NV magnetometry as a practical and unique tool for fundamental studies in nanomagnetism.

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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