Nakatani Yoshinobu, Yamada Keisuke, Hirohata Atsufumi
Graduate school of Informatics and Engineering, University of Electro- Communications, Chohu, Tokyo, Japan.
Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Gifu-shi, Gifu, Japan.
Sci Rep. 2019 Sep 17;9(1):13475. doi: 10.1038/s41598-019-49875-7.
Magnetic Skyrmions are energetically stable entities formed in a ferromagnet with a diameter of typically below 100 nm and are easily displaceable using an electrical current of 10 A/cm, resulting the Skyrmions to be more advantageous than domain walls for spintronic memory applications. Here, we demonstrated switching of a chirality of magnetic Skyrmions formed in magnetic thin films by introducing a pulsed heat spot using micromagnetic simulation. Skyrmions are found to expand with a pulsed heat spot, which induces the magnetic moments surrounding the Skyrmion to rotate by this expansion, followed by the chirality switching of the Skyrmion. Such simple controllability can be used as a fundamental building block for memory and logic devices using the chirality of Skyrmions as a data bit.
磁斯格明子是在铁磁体中形成的能量稳定的实体，其直径通常小于100纳米，并且使用10 A/cm的电流就可以轻松移动，这使得斯格明子在自旋电子学存储应用中比磁畴壁更具优势。在此，我们通过微磁模拟引入脉冲热斑，展示了在磁性薄膜中形成的磁斯格明子手性的切换。研究发现，斯格明子会随着脉冲热斑而扩展，这种扩展会导致斯格明子周围的磁矩发生旋转，随后斯格明子的手性发生切换。这种简单的可控性可作为使用斯格明子手性作为数据位的存储和逻辑器件的基本构建模块。
