Observation of L10-like chemical ordering in a decahedral FePt nanoparticle by Cs-corrected high resolution transmission electron microscopy
Observation of L10-like chemical ordering in a decahedral FePt nanoparticle by Cs-corrected high resolution transmission electron microscopy
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DOI：
10.1063/1.3068407
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发表时间：
2009-04-01
影响因子：
3.2
通讯作者：
Yuan, Jun
中科院分区：
文献类型：
--
作者：
Hu, Xuerang;Xie, Lin;Yuan, Jun
The state of the chemical ordering in a decahedral FePt nanoparticle was studied using aberration corrected high resolution transmission electron microscopy. With the reduced image delocalization effect as a result of spherical aberration correction, it is possible to directly correlate the image intensity with the local state of chemical ordering through the help of a multislice image simulation. We have found direct evidence for the image intensity oscillation from one atomic layer to another. It is interpreted as L1(0)-like chemical ordering, i.e., the alternate occupation of Fe and Pt atoms in the (002) planes. The result suggests that chemical ordering survives even in decahedral nanoparticles down to 3 nm size despite the possible surface effects. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3068407]
