Use of cathodoluminescence microscopy to distinguish semiconducting from metallic phases in highTcsuperconductors

Autor:	J. H. Miller, John D. Hunn, S. L. Holder, C. R. Bagnell, A. N. DiBianca
Rok vydání:	1990
Předmět:	Superconductivity High-temperature superconductivity Materials science Physics and Astronomy (miscellaneous) Scanning electron microscope Resolution (electron density) Analytical chemistry Mineralogy Cathodoluminescence law.invention law Microscopy Electron microscope Luminescence
Zdroj:	Applied Physics Letters. 56:89-91
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.103275
Popis:	We show that semiconducting and insulating metal‐oxide phases emit substantially greater luminescence when irradiated with 10–30 keV electrons than metallic, candidate high Tc superconducting phases. The use of a cathodoluminescence (CL) detector in a scanning electron microscope to form high‐resolution CL images of Y2O3, BaCO3, Y2BaCuO5, oxygen‐depleted YBa2Cu3O7−x(x>0.5), and oxygen‐annealed YBa2Cu3O7−x(x∼0) is reported. The spatial resolution obtained in CL micrographs of YBa2Cu3O7−x is found to be about 0.1 μm when the electron beam current is 190 nA. The use of CL microscopy in combination with energy‐dispersive x‐ray analysis may be a promising technique for identifying candidate superconducting phases of novel stoichiometry in complex multiphase samples.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f10ec550e311ee5ef76f059a4f98af10 https://doi.org/10.1063/1.103275 Zobrazit plný text záznamu