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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Bodea, Marius
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (7/7 displayed)
- 2012Ion beam irradiation of cuprate high-temperature superconductors: Systematic modification of the electrical properties and fabrication of nanopatternscitations
- 2012Non-ohmic electrical transport properties above the critical temperature in optimally and underdoped superconducting YBa2Cu3O6+xcitations
- 2011Modeling of Droplet Dynamic and Thermal Behavior during Gas Atomization Process
- 2010Optically induced changes and long-term relaxations of resistivity and critical temperature in He+ irradiated YBa2Cu3Oxcitations
- 2010Surface planarization and masked ion-beam structuring of YBa2Cu3O7 thin filmscitations
- 2010Modification and nano-patterning of high-Tc superconducting thin films by masked ion beam irradiationcitations
- 2009Masked ion beam irradiation of high-temperature superconductors: patterning of nano-size regions with high point-defect densitycitations
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article
Masked ion beam irradiation of high-temperature superconductors: patterning of nano-size regions with high point-defect density
Abstract
Ion-beam irradiation of high-temperature superconductors creates different types of defects depending on ion mass, energy and dose. Computer simulations reveal the diversity of the ion-target interactions with YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub> and are compared to previous experimental results from transmission electron microscopy and electrical transport properties. While protons have a very low efficiency to create defects in YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub>, significantly heavier ions produce defect clusters and inhomogeneous damage in the target material. The situation is exemplarily illustrated by a computer simulation study of the defect cascades produced by H<sup>+</sup>, He<sup>+</sup>, Ne<sup>+</sup>, and Pb<sup>+</sup> ions of moderate energy. He<sup>+</sup> ions with energy of about 75 keV were found useful for a systematic modification of the electrical properties of high-temperature superconductors, since they do not implant into 100-nm thick films of YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub> but primarily create point defects by displacement of the oxygen atoms. Such defects are very small and distributed homogeneously in YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub>. The small lateral spread of the collision cascades allows for the patterning of nanostructures by directing a low-divergence beam of He+ ions onto a thin film of YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub> through a mask. Simulations indicate that the resolution can be about 10 nm. An experimental test with a masked ion beam irradiation confirmed that features with about 200 nm size could be produced in a YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub> thin film and observed by scanning electron microscopy.