Noncharacteristic Defects in Thin Films of Cobalt Ferrites

Abstract
High‐voltage transmission electron microscopy has been used to study the structure of thin films of cobalt ferrites of various compositions. Small defects have been identified to result from a combination of chemical polishing used to prepare foils and subsequent radiation damage in the electron microscope. Such defects must be distinguished from the characteristic defects, such as small precipitates, since they are representative only of the preparation and examination techniques.