Patterned Electron Beam Exposures of YBCO - Towards Local Control of Doping
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A4 Artikkeli konferenssijulkaisussa
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Date
2017
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en
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4
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Conference on the Application of Accelerators in Research and Industry, CAARI 2016, 30 October – 4 November 2016, Ft. Worth, TX, USA, pp. 381-384, Physics Procedia ; Volume 90
Abstract
Local control of dopant profiles and ordered doping in high Tc superconductors have the potential to greatly increase the transition temperature, Tc. We report on experiments where we used focused electron beams to locally modulate the oxygen dopant concentration in commercial YBCO films (100 nm on LaAlO3). Patterned exposure of YBCO samples to 10 keV electrons and fluences in the 1020 e-/cm2 range led to increases of Tc of ∼0.4 K, comparable to earlier reports from broad beam exposures in a similar fluence regime. We discuss our results in relation to concepts of local oxygen depletion and chain ordering induced by ionizing radiation and outline possible processing paths to implement a form of modulation doping in YBCO by patterning with intense, short excitation pulses (e. g. of MeV protons).Description
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doping, electron beams, high T superconductivity
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Lake, R E, Mueller, A, Pan, H, Persaud, A, Ludewigt, B A, Kresin, V Z, Minor, A M, Seidl, P A & Schenkel, T 2017, Patterned Electron Beam Exposures of YBCO - Towards Local Control of Doping . in Conference on the Application of Accelerators in Research and Industry, CAARI 2016, 30 October – 4 November 2016, Ft. Worth, TX, USA . Physics Procedia, vol. 90, Elsevier, pp. 381-384, International Conference on the Application of Accelerators in Research and Industry, Ft. Worth, Texas, United States, 30/10/2016 . https://doi.org/10.1016/j.phpro.2017.09.037