Advanced magneto-optical Kerr effect measurements of superconductors at low temperatures
| Autor: | Jonas Bayer, Joachim Albrecht, Patrick Zahn, Joachim Gräfe, Stephen Ruoß, J. Simmendinger, C. Stahl, Gisela Schütz |
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| Rok vydání: | 2017 |
| Předmět: |
Superconductivity
High-temperature superconductivity Materials science Field (physics) business.industry General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology Magnetic hysteresis 01 natural sciences lcsh:QC1-999 Amorphous solid Magnetic field law.invention Condensed Matter::Materials Science Magneto-optic Kerr effect law Condensed Matter::Superconductivity 0103 physical sciences Optoelectronics Thin film 010306 general physics 0210 nano-technology business lcsh:Physics |
| Zdroj: | AIP Advances, Vol 7, Iss 10, Pp 105019-105019-7 (2017) |
| ISSN: | 2158-3226 |
| DOI: | 10.1063/1.4985044 |
| Popis: | Magneto-optical Kerr-effect (MOKE) measurements of superconducting films with soft-magnetic coatings are performed at low temperatures using a laser-based MOKE set-up. An elaborate measurement scheme with internal reference allows the quantitative comparison of the temperature dependent Kerr-amplitude with the magnetic field generated by supercurrents. For this purpose, an amorphous CoFeB thin film exhibiting a large Kerr-signal is deposited directly on top of the YBCO superconductor acting as field sensing layer. It is shown that the resulting magnetic hysteresis loops of the soft-magnetic film can be used to reconstruct the electric properties of the superconductor. |
| Databáze: | OpenAIRE |
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