[19a-PB2-1~39] 11 Superconductivity (Poster)

[19a-PB2-19] Influence of the Al thickness of Nb/Al-AlO_x/Nb Josephson junction on the magnetic field dependence of the Josephson current

〇Kazuki Kobayashi¹, Akiyoshi Nakayama¹, Susumu Abe¹, Norimichi Watanabe¹ (1.Kanagawa Univ.)

Keywords:Josephson junction

We have fabricated a Nb/Al-AlO_x/Nb Josephson junction and have measured its current-voltage characteristics and the two-dimensional magnetic field dependence of the Josephson current. In this study, we have fabricated several Nb/Al-AlO_x/Nb Josephson junctions with different thicknesses of Al overlayer and have investigated the effect of the Al overlayer thicknesses on the two-dimensional magnetic field dependence of the Josephson current. The subpeak of the Fraunhofer diffraction pattern was not obviously observed as the Al overlayer got thicker.