Magnetization Reversal of Strongly Exchange-Coupled Double Nanolayers for Spintronic Devices
Magnetization Reversal of Strongly Exchange-Coupled Double Nanolayers for Spintronic Devices
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DOI：
10.1021/acsanm.9b01243
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发表时间：
2019-11
影响因子：
5.9
通讯作者：
Xue Zhao;A. Mandru;C. Vogler;M. Marioni;Dieter Suess;Hans J. Hug
中科院分区：
文献类型：
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作者：
Xue Zhao;A. Mandru;C. Vogler;M. Marioni;Dieter Suess;Hans J. Hug
当代自旋电子器件，特别是具有高线性范围的GMR和TMR传感器，将受益于超过1 T的大偏置场，这已经在使用稀土-过渡金属亚铁磁体作为钉扎层的交换耦合双层中观察到。然而，在利用强耦合之前，必须在最小器件的尺度上理解反转过程，在那里它是有效的。由于在几特斯拉的磁场中成像小于20纳米的磁性结构的技术难度，迄今为止对这些过程知之甚少。在这里，我们的图像的双层纳米级的磁性结构，包括一个多晶的Co/Pt多层（Co/Pt），这是强烈的交换耦合到一个非晶和磁性硬亚铁磁TbFe合金层。高分辨率磁力显微镜提供了磁结构的快照沿着各种应用领域之间的0和7 T的磁化反转发生。与磁化反转相反...
Contemporary spintronics devices, notably GMR and TMR-sensors with high linear ranges, stand to benefit from large bias fields in excess of 1T that have been observed in exchange-coupled double layers using rare earth-transition metal ferrimagnets as pinning layers. However, before exploiting the strong coupling the reversal process must be understood at the scales of the smallest devices, where it would be effective. Little is known about these processes to-date, owing to the technical difficulty of imaging magnetic structures smaller than 20nm in fields of several Tesla. Here we image the nanoscale magnetic structures of a double layer comprising a polycrystalline Co/Pt-multilayer (Co/Pt) which is strongly exchange-coupled to an amorphous and magnetically-hard ferrimagnetic TbFe alloy layer. High resolution magnetic force microscopy provides snapshots of the magnetic structures along various applied fields between 0 and 7T as the magnetization reversal takes place. In contrast to a magnetization reversa...