| Project/Area Number |
21760232
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Electronic materials/Electric materials
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| Research Institution | Nagaoka University of Technology |
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Principal Investigator |
KATO Takahiro Nagaoka University of Technology, 工学部, 助教 (10432098)
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| Project Period (FY) |
2009 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
|
| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2009: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
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| Keywords | Bi-2212 / 希塩酸改質 / dc-SQUID / 磁気センサ / 固有ジョセフソン接合 |
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| Research Abstract |
We have previously reported on an acid-treatment process for the fabrication of Bi2Sr2CaCu2Ox (Bi-2212) stacks. In this process, we found interesting phenomena that Bi-2212 single crystal dipped into acid solution of pH>1.4 was varied to transparent material. In this study, we tried to fabricate dc-SQUID with an in-plane loop having two stacks of IJJs by this acid-treatment process. The SQUID without a shunt resistor showed large hysteretic current-voltage characteristics at liquid N2 temperature. In addition, we fabricated dc-SQUIDs attached to the shunt resistor, which exhibited nonhysteretic current - voltage characteristics. The SQUIDs showed periodic modulation of the critical current Ic(B) as a function of magnetic field at 77K. Although there are many problems to be solved, the proposed acid treatment process may be useful for dc-SQUID based on Bi-2212 IJJs.
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