Vortex Electronics

涡旋电子

• 批准号: 10142104
• 负责人: KOBAYASHI Takeshi
• 金额: $ 39.81万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas (A)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10142104/
• 关键词: Vortex; High temperature superconductor; quantum magnetic flux; SQUID; Josephson junction; 薄膜; 磁気工学; 量子磁束; 高温超伝導; 医用電子; センサー; マイクロ波; 量子効果; デジタル

The Priority area "Vortex Electronics" was settled from 1998 to 2000, just for three years until the end of the 20th century. During this period, the research project placed three items to be explored : (1) the basic research and visualization of vortex, (2) progressive application to vortex electronics and (3) establishment of advanced technologies for oxides and oxide superconductors.Ultrashort laser pulse probe method was establihed to visualize and control the vortices via modulation of supercurrent by laser irradiation. Modified Bitter's method was proposed and the improved spatial resolution limit was experimentally verified. Through this proposal, the temporal dynamics of the vortex in the HTSC thin films were observed clearly in YBCO and BSCCO. The most outstanding result was the discovery of charged vortex in the oxide superconductors. So far, in the metal superconductors, every one has believed that the normal-core of the vortex is electrically neutral. This concept was found not to be conveyed to the oxide superconductors.Vortex dynamics were closely investigated by several sensitive methods and explored the origin of fluctuation noise. On the basis of these knowledges, low noise SQUIDs were fabricated and investigated. SQUID microscope, SQUID bio-sensor and "Open-SQUID" were proposed and actually fabricated. High speed RSFQ application was checked and demonstrated at around 30 GHz.New PLD technology was proposed and named Aurora-PLD. It is very suitable to grow thin films at lower temperatures.

“Vortex Electronics”的优先领域从1998年到2000年，仅用了三年时间，直到世纪结束。在此期间，本研究计划提出了三个课题：（1）涡旋的基础研究和可视化，（2）涡旋电子学的逐步应用，（3）氧化物和氧化物超导体的先进技术的建立，建立了超短激光脉冲探针方法，通过激光照射调制超电流来可视化和控制涡旋。提出了一种改进的Bitter方法，并通过实验验证了该方法的有效性.通过这一方案，在YBCO和BSCCO中清晰地观察到了高温超导薄膜中涡旋的时间动力学过程。最突出的成果是在氧化物超导体中发现了荷电涡旋。到目前为止，在金属超导体中，人们都认为涡旋的正常核是电中性的。我们用几种灵敏的方法仔细研究了涡旋动力学，并探讨了涨落噪声的来源。在此基础上，研制了低噪声SQUID器件。提出并实际制作了SQUID显微镜、SQUID生物传感器和“Open-SQUID”。在30 GHz左右的频率上验证了高速RSFQ的应用，提出了一种新的PLD技术Aurora-PLD。它非常适合在较低温度下生长薄膜。

项目成果

小林 猛, 斗内政吉: "高温超伝導エレクトロニクスの最近の動向"応用物理. 71,1. 1-11 (2002)

Takeshi Kobayashi，Masakichi Tonai：“高温超导电子学的最新趋势”应用物理学 71,1 (2002)。

K. Sakuta, T. Fujii, T. Kobayashi and M. Tonouchi: "Design and Feasibility Test of HTS Open-SQUID System forMagnetocardiogram Measurement"ISS'01. 73-73 (2001)

K. Sakuta、T. Fujii、T. Kobayashi 和 M. Tonochi：“用于心磁图测量的 HTS Open-SQUID 系统的设计和可行性测试”ISS01。

M. Tonouchi, S. Shikii & M. Hangyo: "Visualization of Optically Controlled Magnetic Flux in YBaCuO Thin Film Loop by Terahertz Radiation Imaging"Jpn. J. Appl. Phys.. 38, 11A. L1301-L1303 (1999)

M. Tonouchi、S. Shikii

T.Kobayashi, M.Tachiki, H.Akiyoshi: "Development of Prominent PLD(Aurora method)Suitable for High-quality and Low-temperature Film Growth"The 6th Int.Conf.on Laser Ablatioin(COLA'01). 6. 1-3 (2001)

T.Kobayashi、M.Tachiki、H.Akiyoshi：“适合高质量低温薄膜生长的杰出PLD（Aurora法）的开发”第六届激光烧蚀国际会议（COLA01）。

M.Tachiki,T.Hosomi and T.Kobayashi: "Room-Temperature Heteriepitaxial Growth of NiO Thin Films using Pulsed Laser Deposition"Jpn.J.Appl.Phys.. 39,4A. 1817-1820 (2000)

M.Tachiki、T.Hosomi 和 T.Kobayashi：“使用脉冲激光沉积实现 NiO 薄膜的室温异质外延生长”Jpn.J.Appl.Phys.. 39,4A。