Chapter

Scanning transmission electron microscopy of oxides

M. Varela, C. Leon, J. Santamaria and S. J. Pennycook

in Multifunctional Oxide Heterostructures

Published in print August 2012 | ISBN: 9780199584123
Published online January 2013 | e-ISBN: 9780191745331 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199584123.003.0005
Scanning transmission electron microscopy of oxides

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Complex oxides represent a hot field of materials physics, exhibiting some of the most disparate physical behaviours such as colossal magnetoresistance or High-Tc superconductivity, which are still far from understood. Many of these properties rely on the presence of small active regions, and in many cases it has been suggested that these behaviours may be linked to an underlying density of defects, such as O vacancies. A full understanding of the physical processes involved relies on probes capable of studying these systems in real space and with atomic resolution. This chapter reviews the state-of-the-art of scanning transmission electron microscopy and electron energy-loss spectroscopy along with some applications to complex oxides. It starts by giving a brief introduction to the technique, including explanations of the mechanisms underlying imaging and issues with interpretation. This is followed with a number of applications to both bulk oxide materials and interfaces in heterostructures.

Keywords: complex oxides; electron microscopy; stem; eels; spectroscopy; aberration correction

Chapter.  11925 words.  Illustrated.

Subjects: Condensed Matter Physics

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