SURFACE PHASE DECOMPOSITION IN Bi2Sr2CaCu2O7-y SINGLE CRYSTALS UNDER NITROGEN IONS IRRADIATION |
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| Affiliation: | Laboratory of Structure Analysis, University of Science and Technology of China, Academia Sinica, Hefei 230026, China, and Center for Advanced Studies in Science and Technology of Microstructures, Nianjing 210093, China |
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| Abstract: | The influence of irradiation by 30 keV nitrogen ions with a fluence 1×1018N+·cm-2 on the crystal structure of single crystal Bi2Sr2CaCu2O7-y was investigated by means of X-ray photoelectron spectroscopy and X-ray diffraction. The irradiation caused a transformation from Bi2Sr2CaCu2O7-y (2212 phase) to Bi2Sr2CuO5-x (2201 phase). It was observed that. a small amount of metallic bismuth with an average thickness of about 6.3nm appeared after the irradiation. The possible reaction mechanism under nitrogen-ion irradiation was discussed. |
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