High Resolution Electron Microscopy of Reacting Solids
High resolution electron microscopes like the JEM 100C used in the present study have a resolution close to 3Å between points.This is within the range of interplanar distances for a score of inorganic compounds.It is possible to have images of the periodic poten-tial in the crystal,that is an image of the atomic distribution. The images are formed by interference of the direct beam with one,or several,diffracted beams.The images have the same periodicity as the diffracted atomic planes with a resolution which can be as low as 1.4 Å.Very stringent conditions are to be meet, especially with regard to the sample thickness and orientation.To obtain a convenient contrast it is necessary to underfocus the objective by some hundreds of Angströms. (1).
KeywordsRare Earth Atomic Plane Thin Film Sample High Resolution Electron Microscopy Atomic Distribution
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