[12p-S301-1~15] 6.2 Carbon-based thin films

△ [12p-S301-15] Miniaturization of Josephson Junction in Diamond SQUID

〇(B)Chiyuki Wakabayashi¹, Yasuhiro Takahashi¹, Taisuke Kageura^1,2, Yoshihiko Takano², Minoru Tachiki², Shuuichi Ooi², Shunichi Arisawa², Hiroshi Kawarada^1,3 (1.Waseda Univ., 2.NIMS, 3.Zaiken)

Keywords:diamond, Superconductor, Josephson Junction

Superconducting diamond has high durability. Therefore, it is expected to be used for robust superconducting devises. In this study, Josephson junctions in SQUID were miniaturized by non-conventional process in order to increase voltage modulation V_p-p of SQUID which is lower than that of other materials. As a result, V_p-p=47.7 µV was obtained, which was much higher than the highest value for Diamond SQUID ever. This shows that superconducting diamond has comparable potential for Josephson junction to other materials.