Magnetic skyrmions are knot-like quasiparticles. They are candidates for non-volatile data storage in which information is moved between fixed read and write terminals. The read-out operation of skyrmion-based spintronic devices will rely on the electrical detection of a single magnetic skyrmion within a nanostructure. Here we present Pt/Co/Ir nanodiscs that support skyrmions at room temperature. We measured the Hall resistivity and simultaneously imaged the spin texture using magnetic scanning transmission X-ray microscopy. The Hall resistivity is correlated to both the presence and size of the skyrmion. The size-dependent part matches the expected anomalous Hall signal when averaging the magnetization over the entire disc. We observed a resistivity contribution that only depends on the number and sign of skyrmion-like objects present in the disc. Each skyrmion gives rise to 22 ± 2 nΩ cm irrespective of its size. This contribution needs to be considered in all-electrical detection schemes applied to skyrmion-based devices. Not only the area of Néel skyrmions but also their number and sign contribute to their Hall resistivity.

磁性天rm是结状的准粒子。它们是非易失性数据存储的候选对象，其中信息在固定的读和写终端之间移动。基于天rm子的自旋电子器件的读出操作将取决于对纳米结构内单个磁性天sky子的电检测。在这里，我们介绍了在室温下支持天体离子的Pt / Co / Ir纳米圆盘。我们测量了霍尔电阻率，并同时使用磁扫描透射X射线显微镜对自旋纹理进行了成像。霍尔电阻率与天敌的存在和大小相关。在整个磁盘上平均磁化强度时，与尺寸有关的部分与预期的异常霍尔信号相匹配。我们观察到电阻率的贡献仅取决于圆盘中存在类似天敌的物体的数量和符号。不论其尺寸如何，每个天合子都会产生22±2nΩcm。在应用于基于天蝎子的设备的全电检测方案中需要考虑这一贡献。不仅是Néel空中天体的面积，而且它们的数量和符号都对其霍尔电阻率有所贡献。