Modulation depth of series SQUIDs modified by Josephson junction area
Liu Jie1, Gao He2, 3, Li Gang1, Wei Li Zheng2, Ahmada Kamal1, Ying Shan Zhang1, Liu Jian She1, Chen Wei1, †
       

(color online) Amplification curves of SQUIDs with different junction areas of (a) 5.3 μm2, (b) 8.2 μm2, (c) 15.9 μm2, (d) 22.5 μm2.