Low-field formation of room-temperature biskyrmions in centrosymmetric MnPdGa magnet
Low-field formation of room-temperature biskyrmions in centrosymmetric MnPdGa magnet
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中心对称 MnPdGa 磁体中室温双斯格明子的低场形成
DOI：
10.1063/1.5089609
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发表时间：
2019
影响因子：
4
通讯作者：
Zhang Zhidong
中科院分区：
文献类型：
--
作者：
Xiao Xiaofei;Peng Licong;Zhao Xinguo;Zhang Ying;Dai Yingying;Guo Jie;Tong Min;Li Ji;Li Bing;Liu Wei;Cai Jianwang;Shen Baogen;Zhang Zhidong
磁skyrmions是一种在磁性材料中受到拓扑保护的局域自旋织构，具有尺寸小、操纵电流密度低等特点，是高密度磁存储器件的潜在信息载体。对于技术应用，在低磁场下，在室温附近的温度范围内稳定skyrmions是必不可少的。在这里，我们证明了磁biskyrmions形成在低磁场中，在室温下，在中心对称的六方MnPdGa磁体通过洛伦兹透射电子显微镜结合运输和磁性测量。在0.15T的磁场中，在300K下产生了高密度的双克尔米离子。此外，当磁场减小时，铁磁畴中可以产生双克尔介子，并且部分双克尔介子仍保持在零场。在室温附近观察到较大的拓扑霍尔电阻率。此外，一个宽的温度和磁场窗口的biskyrmions推导出的运输和磁性。单组分材料在室温附近同时具有高密度和低磁场的特性，使MnPdGa成为未来基于Skyrmion的拓扑自旋电子学应用的一个很有前途的候选者。磁性Skyrmion是磁性材料中一种受拓扑保护的局域自旋织构，具有比铁磁畴壁更小的尺寸和更低的操纵电流密度，作为高密度磁存储设备的潜在信息载体而被突出。对于技术应用，在低磁场下，在室温附近的温度范围内稳定skyrmions是必不可少的。在这里，我们证明了磁biskyrmions的形成在低磁场中，在室温下，在中心对称的六方MnPdGa磁体通过洛伦兹透射电子显微镜结合运输和磁性测量。在0.15T的磁场中，在300K下产生了高密度的双克尔米离子。此外，当磁场减小时，铁磁畴中可以产生双克尔介子，并且部分双克尔介子仍保持在零场。在室温附近观察到较大的拓扑霍尔电阻率。此外，
Magnetic skyrmions, a kind of localized spin texture topologically protected in magnetic materials, characterized by smaller size and much lower manipulating current density in comparison with ferromagnetic domain walls, are highlighted as potential information carriers for high-density magnetic storage devices. For technological applications, the stabilization of skyrmions in a temperature range around room temperature under a low magnetic field is essential. Here, we demonstrate the formation of magnetic biskyrmions in a low magnetic field at room temperature in a centrosymmetric hexagonal MnPdGa magnet via Lorentz transmission electron microscopy in combination with transport and magnetic measurements. High-density biskyrmions are generated at 300 K in a magnetic field of 0.15 T. In addition, biskyrmions can be generated from ferromagnetic domains and partly remained at zero field when the magnetic field is decreased. A large topological Hall resistivity is observed near room temperature. Furthermore, a wide temperature and magnetic-field window for biskyrmions is deduced from transport and magnetic properties. The simultaneous features of high-density and low magnetic field near room temperature in a single-component material make MnPdGa a promising candidate for future skyrmion-based topological spintronic applications.Magnetic skyrmions, a kind of localized spin texture topologically protected in magnetic materials, characterized by smaller size and much lower manipulating current density in comparison with ferromagnetic domain walls, are highlighted as potential information carriers for high-density magnetic storage devices. For technological applications, the stabilization of skyrmions in a temperature range around room temperature under a low magnetic field is essential. Here, we demonstrate the formation of magnetic biskyrmions in a low magnetic field at room temperature in a centrosymmetric hexagonal MnPdGa magnet via Lorentz transmission electron microscopy in combination with transport and magnetic measurements. High-density biskyrmions are generated at 300 K in a magnetic field of 0.15 T. In addition, biskyrmions can be generated from ferromagnetic domains and partly remained at zero field when the magnetic field is decreased. A large topological Hall resistivity is observed near room temperature. Furthermore, ...