Magnetotransport properties of high-quality cobalt nanowires grown by focused-electron-beam-induced deposition
Magnetotransport properties of high-quality cobalt nanowires grown by focused-electron-beam-induced deposition
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DOI：
10.1088/0022-3727/42/5/055005
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发表时间：
2009-03-07
影响因子：
3.4
通讯作者：
Ibarra, M. R.
中科院分区：
文献类型：
--
作者：
Fernandez-Pacheco, A.;De Teresa, J. M.;Ibarra, M. R.
采用聚焦电子束诱导沉积法（FEBID）生长了高质量的钴纳米线，并测定了其磁性和输运性质。纳米线含有高达约95%的钴原子百分比，如通过EDX光谱法测量的，与通过相同技术生长的其他金属沉积物相比，这显著地代表了高的值。已发现Co含量与用于生长的束电流相关。通过四探针测量研究了单个纳米线的磁输运性质。对于具有最高Co含量的纳米线，在室温下的电阻率是低的（类似于40 μ Ω cm），并显示金属温度依赖性。磁输运性质清楚地证明了纳米线的铁磁性质，其饱和磁化强度为M-s = 1329 +/- 20 emu cm（-3），非常接近体相。由于这种类型的生长在目标位置的局部特征及其高横向分辨率，这些结果为创造具有高质量Co的全部潜力的磁性纳米结构和器件铺平了道路。
High-quality cobalt nanowires have been grown by focused-electron-beam-induced deposition (FEBID) and their magnetic and transport properties determined. The nanowires contain up to about 95% Co atomic percentage, as measured by EDX spectroscopy, which remarkably represents a high value compared with other metal deposits grown by the same technique. The Co content has been found to correlate with the beam current used for the growth. The magnetotransport properties have been studied on individual nanowires through 4-probe measurements. For the nanowires with the highest Co content, the resistivity at room temperature is low (similar to 40 mu Omega cm), and shows metallic temperature dependence. The magnetotransport properties clearly demonstrate the ferromagnetic nature of the nanowire, with a saturation magnetization of M-s = 1329 +/- 20 emu cm(-3), very close to the bulk one. Due to the local character of this type of growth at targeted places and its high lateral resolution, these results pave the way for the creation of magnetic nanostructures and devices with the full potentiality of high-quality Co.