Details

Autor(en) / Beteiligte

• Stahl, Claudia
• Gräfe, Joachim
• Ruoß, Stephen
• Zahn, Patrick
• Bayer, Jonas
• Simmendinger, Julian
• Schütz, Gisela
• Albrecht, Joachim

Titel

Advanced magneto-optical Kerr effect measurements of superconductors at low temperatures

Ist Teil von

• AIP advances, 2017-10, Vol.7 (10), p.105019-105019-7

Ort / Verlag

Melville: American Institute of Physics

Erscheinungsjahr

2017

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• 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.