Experimental data show that the normal state resistivity of superconducting Bi2Sr2CaCu2O8+δ (Bi-2212) whiskers increases after a six-hours irradiation by a synchrotron μ-beam with 17 keV photons. We analyze this result on the basis of previously reported effects in Bi-2212 whiskers due to ageing or heating processes. A finite element model of the experimental setup clarifies that the heat load induced by the microbeam has to be excluded as a possible cause for the material changes. The knock-on the interstitial, loosely bound, O species by secondary electrons is discussed as the most likely mechanism responsible for this effect.

17 keV-photon induced damage of Bi-2212 whiskers by synchrotron μ-beam exposure

CAGLIERO, Stefano;AGOSTINO, Angelo;LAMBERTI, Carlo;TRUCCATO, Marco
2011

Abstract

Experimental data show that the normal state resistivity of superconducting Bi2Sr2CaCu2O8+δ (Bi-2212) whiskers increases after a six-hours irradiation by a synchrotron μ-beam with 17 keV photons. We analyze this result on the basis of previously reported effects in Bi-2212 whiskers due to ageing or heating processes. A finite element model of the experimental setup clarifies that the heat load induced by the microbeam has to be excluded as a possible cause for the material changes. The knock-on the interstitial, loosely bound, O species by secondary electrons is discussed as the most likely mechanism responsible for this effect.
24
3
035009
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http://iopscience.iop.org/0953-2048/24/3/035009/
Bi-2212; whiskers; X-rays; microbeam; radiation damage; synchrotron radiation
Gheorghe Aldica; Stefano Cagliero; Angelo Agostino; Carlo Lamberti; Marco Truccato
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2318/79958
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