Atomic-resolution chemical imaging of oxygen local bonding environments by electron energy loss spectroscopy

被引：35
|
作者：
Mundy, Julia A. [1 ]
Mao, Qingyun [1 ]
Brooks, Charles M. [2 ,3 ]
Schlom, Darrell G. [2 ,4 ]
Muller, David A. [1 ,4 ]
机构：
[1] Cornell Univ, Sch Appl & Engn Phys, Ithaca, NY 14853 USA
[2] Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14853 USA
[3] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
[4] Kavli Inst Cornell Nanoscale Sci, Ithaca, NY 14853 USA
来源：
APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 04期
基金：
美国国家科学基金会;
关键词：
FINE-STRUCTURE; K-EDGE; FERROELECTRICITY; LUFE2O4; OXIDES;
D O I：
10.1063/1.4737208
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Electron energy loss spectroscopy on an aberration-corrected scanning transmission electron microscope was used to map the elemental composition and bonding in a thin film of the multiferroic LuFe2O4 with atomic resolution. A two-dimensional analysis of the fine structure of the O-K edge yielded distinct signals for the two inequivalent oxygen sites in the crystal. Comparison to an ab-initio simulation showed that these two components can be interpreted in terms of the differing hybridization of the O p orbitals to the Lu and Fe d orbitals, thus producing an atomic-resolution map of the local oxygen bonding environment. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4737208]
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页数：5
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