Quality assessment of MgO substrate materials for high Tc superconductor thin films using cathodoluminescence microscopy

✍ Scribed by P.R. Fletcher; C. Leach

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 805 KB
• Volume: 15
• Category: Article
• ISSN: 0955-2219
• DOI: 10.1016/0955-2219(95)00027-r

✦ Synopsis

Cathodoiuminescence (CL) microscopy has been used to investigate

the luminescence response of MgO single crystal substrates intended for high T, superconductor applications. Wavelength resolved CL spectra have been collected from both the surface and the bulk of the MgO single crystals, under direrent preparatory treatments. It was found that annealing the MgO resulted in the reduction of luminescent surface defect states present in the asreceived and ion milled samples and at sites of surface damage. The surface treatment given to MgO single crystals can signtf?cantIy afSect the electrical properties of high T, superconducting thin films deposited on them.