Characterization of a new cobalt precursor for focused beam deposition of magnetic nanostructures
Characterization of a new cobalt precursor for focused beam deposition of magnetic nanostructures
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DOI：
10.1016/j.mee.2010.12.031
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发表时间：
2011-08-01
影响因子：
2.3
通讯作者：
Frabboni, S.
中科院分区：
文献类型：
--
作者：
Gazzadi, G. C.;Mulders, J. J. L.;Frabboni, S.
研究了用聚焦电子束和聚焦离子束诱导沉积(FEBID和FIBID)方法制备的Co(CO)(3)NO前驱体纳米线的电磁性能。沉积的纳米线具有相似的钴含量，约为50-55at.%，但电学行为不同：FEBID纳米线具有高阻性(在RT为6.3mOmega cm)和低T非金属，而FIBID纳米线具有低得多的电阻率(在RT为189 mU Omega cm)，并且它是金属的。用磁阻测量测试的磁性揭示了这两种纳米线的非磁性行为。在真空中400℃退火后，FEBID丝的电阻大大降低(在RT时为62微欧姆厘米)，并在低温下恢复了金属行为，FEBID丝和FIBID丝都表现出铁磁行为。低能扫描电子显微镜(LE-STEM)的结构分析表明，Co纳米颗粒的粗化和互连是提高其电磁性能的主要原因。(C)2011爱思唯尔B.V.保留所有权利。
The electrical and magnetic properties of nanowires deposited from cobalt tricarbonyl nitrosyl (Co(CO)(3)NO) precursor by focused electron beam- and focused ion beam-induced deposition (FEBID and FIBID) have been investigated. As-deposited nanowires have similar Co content, around 50-55 at.%, but different electrical behaviour: FEBID nanowire is highly resistive (6.3 m Omega cm at RT) and non-metallic at low T, while the FIBID one has much lower resistivity (189 mu Omega cm at RT) and it is metallic. The magnetic properties, tested with magnetoresistance measurements, reveal a non-magnetic behaviour for both nanowires. After 400 degrees C annealing in vacuum FEBID wire is much less resistive (62 mu Omega cm at RT) and recovers the metallic behaviour at low T, and both FEBID and FIBID wires display ferromagnetic behaviour. Structural analysis by low energy-scanning transmission electron microscopy (LE-STEM) suggests that coarsening and interconnection of the Co nanograins are responsible for the improvement in electrical and magnetic properties. (C) 2011 Elsevier B.V. All rights reserved.