تقرير
Superconducting properties of Nb thin films deposited on porous silicon templates
| العنوان: | Superconducting properties of Nb thin films deposited on porous silicon templates |
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| المؤلفون: | Trezza, M., Prischepa, S. L., Cirillo, C., Fittipaldi, R., Sarno, M., Sannino, D., Ciambelli, P., Hesselberth, M. B. S., Lazarouk, S. K., Dolbik, A. V., Borisenko, V. E., Attanasio, C. |
| سنة النشر: | 2008 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity |
| الوصف: | Porous silicon, obtained by electrochemical etching, has been used as a substrate for the growth of nanoperforated Nb thin films. The films, deposited by UHV magnetron sputtering on the porous Si substrates, inherited their structure made of holes of 5 or 10 nm diameter and of 10 to 40 nm spacing, which provide an artificial pinning structure. The superconducting properties were investigated by transport measurements performed in the presence of magnetic field for different film thickness and substrates with different interpore spacing. Perpendicular upper critical fields measurements present peculiar features such as a change in the H_c2(T) curvature and oscillations in the field dependence of the superconducting resistive transition width at H=1 Tesla. This field value is much higher than typical matching fields in perforated superconductors, as a consequence of the small interpore distance. Comment: accepted for publication on Journal of Applied Physics |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1063/1.3006014 |
| URL الوصول: | http://arxiv.org/abs/0810.1447 |
| رقم الأكسشن: | edsarx.0810.1447 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1063/1.3006014 |
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