Direct identification of superconducting regions in an inhomogeneous specimen by electron shadow microscopy
| Autor: | Yang Cui-Ying, J. W. Steeds |
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| Rok vydání: | 1988 |
| Předmět: | |
| Zdroj: | Nature. 331:696-698 |
| ISSN: | 1476-4687 0028-0836 |
| DOI: | 10.1038/331696a0 |
| Popis: | Scanning and transmission electron microscopy have played a major part in evaluating the microstructure of the new high-temperature superconductors. Complex fabrication routes have led to a wide variety of phases in the samples produced, and the high-temperature superconductor itself has a complex microstructure on which its superconducting properties are dependent. Finally, the process of preparing specimens for examination by electron microscopy can itself lead to degradation of the superconducting properties. As a result it is desirable to establish directly that the regions studied are indeed superconducting, and to relate the superconducting properties to the local microstructure. Here we describe a convenient method for performing such an evaluation. One possible method, which relies on image contrast in a scanning electron microscope, was recently proposed1. Another, which we discuss here, involves the use of a long established, if little used, technique of electron shadow microscopy2. |
| Databáze: | OpenAIRE |
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