Fabrication process of dc-SQUIDs based on Bi-2212 intrinsic Josephson junctions by dilute hydrochloric acid solutions

稀盐酸溶液制备基于Bi-2212本征约瑟夫森结的dc-SQUIDs的过程

• 批准号: 21760232
• 负责人: KATO Takahiro
• 金额: $ 2.83万
• 依托单位: Nagaoka University of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21760232/
• 关键词: Bi-2212; 希塩酸改質; dc-SQUID; 磁気センサ; 固有ジョセフソン接合

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.

我们之前曾报道过用于制造 Bi2Sr2CaCu2Ox (Bi-2212) 堆栈的酸处理工艺。在此过程中，我们发现了有趣的现象，Bi-2212单晶浸入pH>1.4的酸性溶液中会变成透明材料。在这项研究中，我们尝试通过这种酸处理工艺制造具有两层 IJJ 的面内环路的 dc-SQUID。没有分流电阻的SQUID在液氮温度下表现出大的滞后电流-电压特性。此外，我们还制造了连接到分流电阻器的dc-SQUID，它表现出非迟滞电流-电压特性。 SQUID 显示临界电流 Ic(B) 作为 77K 磁场函数的周期性调制。尽管还有许多问题需要解决，但所提出的酸处理工艺可能对基于 Bi-2212 IJJ 的 dc-SQUID 有用。

项目成果

Analysis of return currents in Bi_2Sr_2CaCu_2O_x Intrinsic Josephson Junctions Process for Bi_2Sr_2CaCu_2O_x SQUIDs

Bi_2Sr_2CaCu_2O_x SQUIDs Bi_2Sr_2CaCu_2O_x 本征约瑟夫森结过程中的返回电流分析

• 发表时间: 2009
• 作者: T. Kato; H. Ishida;K. Hamasaki.
• 通讯作者: K. Hamasaki.

パルス電流法によるBi-2212固有ジョセフソン接合の特性評価II

脉冲电流法表征 Bi-2212 本征约瑟夫森结 II

• 发表时间: 2010
• 作者: 須永悟;廣瀬将圭;加藤孝弘;濱崎勝義
• 通讯作者: 濱崎勝義

B-2212単結晶の希塩酸処理によって生成したBiOCl結晶の誘電率評価

B-2212单晶稀盐酸处理生成BiOCl晶体的介电​​常数评价

• 发表时间: 2009
• 作者: 石田弘樹;高崎正志;小黒恭平;加藤孝弘;濱崎勝義
• 通讯作者: 濱崎勝義

Analysis of teturn currents in Bi_2Sr_2CaCu_2O_x Intrinsic Josephson Junctions

Bi_2Sr_2CaCu_2O_x本征约瑟夫森结的teturn电流分析

• 发表时间: 2009
• 作者: T.Kato;H.Ishida; K.Hamasaki
• 通讯作者: K.Hamasaki

New Fabrication Process for Bi_2Sr_2CaCu_2O_x SQUIDs

Bi_2Sr_2CaCu_2O_x SQUID 的新制造工艺

• 发表时间: 2009
• 作者: T. Kato; T. Yoshida; A. Miwa; H. Shimakage; A. Kawai; H. Suematsu ; K. Hamasaki
• 通讯作者: K. Hamasaki