Development of Ultra-High Sensitive and High-Speed Response Superconducting Digital Magnetometer

2014 Fiscal Year Final Research Report

• Project/Area Number: 25820137
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Electron device/Electronic equipment
• Research Institution: Yokohama National University
• Principal Investigator: YAMANASHI Yuki 横浜国立大学, 工学(系)研究科(研究院), 准教授 (70467059)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 磁気センサ / ジョセフソン接合 / SQUID / ディジタルSQUID / SFQ回路

Outline of Final Research Achievements

We developed an ultra-high sensitive and ultra-high response superconducting digital magnetometer. By on-chip superconducting digital control circuits, the operating point of the superconducting magnetic sensor can be kept to be at the optimum point. Theoretical analysis and fundamental experimental results indicate that high magnetic flux resolution and high-speed response to the input magnetic flux can be achieved by the developed superconducting digital magnetometer. Toward the practical magnetometer system, we investigated magnetic-field-tolerant superconducting circuits that can operate under the earth magnetic field environment. We demonstrated 100 GHz operation of the superconducting T flip-flop with the wide operating margin in the earth magnetic field environment. The practical applications of the superconducting digital magnetometer can be achieved by combining two technologies investigated in this research.

Free Research Field

超伝導エレクトロニクス