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2013 IEEE 14th International Superconductive Electronics Conference (ISEC)最新文献

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DC and RF measurements of superconducting-ferromagnetic multi-terminal devices 超导铁磁多端器件的直流和射频测量
2013 IEEE 14th International Superconductive Electronics Conference (ISEC) Pub Date : 2013-07-07 DOI: 10.1109/ISEC.2013.6604301
G. Prokopenko, O. Mukhanov, I. Nevirkovets, O. Chernyashevskyy, J. Ketterson
{"title":"DC and RF measurements of superconducting-ferromagnetic multi-terminal devices","authors":"G. Prokopenko, O. Mukhanov, I. Nevirkovets, O. Chernyashevskyy, J. Ketterson","doi":"10.1109/ISEC.2013.6604301","DOIUrl":"https://doi.org/10.1109/ISEC.2013.6604301","url":null,"abstract":"We report experimental results of the DC and RF characterization of multi-terminal SFIFSIS devices (where S, I, and F denote a superconductor (Nb), an insulator (AlOx), and a ferromagnetic material (Ni), respectively), which display transistor-like properties. Applying a 0.2 MHz signal in addition to a constant DC bias current to the injector (SFIFS) junction, we observe a voltage gain of ~1.25 on the acceptor SIS junction, if operation point of the SIS junction is chosen in the sub-gap region of its current-voltage characteristic. We also observed a good input-output isolation of our SFIFSIS devices of the order of 30 dBV. The experiments indicate that, after optimization of the geometry and improvement of junction quality, these devices can be used as input-output isolators and amplifiers for memory, digital and RF applications.","PeriodicalId":233581,"journal":{"name":"2013 IEEE 14th International Superconductive Electronics Conference (ISEC)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127969074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Analysis of computational energy efficiency in single-flux-quantum electronics by implementing an integer-based hardware-algorithm 基于整数硬件算法的单通量量子电子学计算能量效率分析
2013 IEEE 14th International Superconductive Electronics Conference (ISEC) Pub Date : 2013-07-07 DOI: 10.1109/ISEC.2013.6604280
Q. Xu, Y. Shimamura, Y. Yamanashi, N. Yoshikawa, T. Ortlepp
{"title":"Analysis of computational energy efficiency in single-flux-quantum electronics by implementing an integer-based hardware-algorithm","authors":"Q. Xu, Y. Shimamura, Y. Yamanashi, N. Yoshikawa, T. Ortlepp","doi":"10.1109/ISEC.2013.6604280","DOIUrl":"https://doi.org/10.1109/ISEC.2013.6604280","url":null,"abstract":"We designed and implemented a single-flux-quantum (SFQ) based hardware-algorithm known as the 3n+1 conjecture. The circuit consists of a 16-bit integer register, a high-frequency clock generator and a central processor. This design can perform with a maximum clock frequency of 90 GHz with a total power consumption of about 0.85 mW based on the AIST 10 kA/cm2 advanced Nb process. The power consumption was further reduced by using an LR-biasing approach.","PeriodicalId":233581,"journal":{"name":"2013 IEEE 14th International Superconductive Electronics Conference (ISEC)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130843723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Magnetic barrier structures for superconductingmagnetic hybrid Josephson junctions 超导磁杂化约瑟夫森结的磁势垒结构
2013 IEEE 14th International Superconductive Electronics Conference (ISEC) Pub Date : 2013-07-07 DOI: 10.1109/ISEC.2013.6604268
B. Baek, S. Benz, W. Rippard, S. Russek, P. Dresselhaus, M. Pufall, H. Rogalla
{"title":"Magnetic barrier structures for superconductingmagnetic hybrid Josephson junctions","authors":"B. Baek, S. Benz, W. Rippard, S. Russek, P. Dresselhaus, M. Pufall, H. Rogalla","doi":"10.1109/ISEC.2013.6604268","DOIUrl":"https://doi.org/10.1109/ISEC.2013.6604268","url":null,"abstract":"If Josephson and spintronic technologies can be successfully integrated to produce a cryogenic memory that can be controlled with single-flux quantum pulses, then they may enable ultra-low-power, high-speed computing. We have developed hybrid Josephson junctions with Nb electrodes, using barrier materials composed of both pseudo-spin valves (PSV) and magnetic-clusters. Our choice of relatively weak ferromagnetic materials such as Ni, PdFe, and NiFeNb enabled us to grow individual layers beyond a few monolayers such that the junctions made with these materials exhibit Josephson coupling as well as magnetic switching behavior. The differences in switching field of each layer were determined by magnetization measurements at 10 K. We fabricated junctions with a wide range of areas (1 μm2 to 100 μm2) by high-throughput, conventional fabrication techniques. In PSV-barrier junctions, the critical current is strongly modulated by the magnetic state in the barrier, including magnetic hysteresis. In junctions with Mn-doped Si barriers, the Josephson coupling was tuned by the density of the Mn magnetic-clusters. Such devices may offer an energy-efficient way to control Josephson junction properties by changing their collective states.","PeriodicalId":233581,"journal":{"name":"2013 IEEE 14th International Superconductive Electronics Conference (ISEC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121481571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Scanning SQUID probe microscope with STM and AFM 扫描SQUID探针显微镜与STM和AFM
2013 IEEE 14th International Superconductive Electronics Conference (ISEC) Pub Date : 2013-07-07 DOI: 10.1109/ISEC.2013.6604263
Y. Miyato, Kouhei Hisayama, Y. Matsui, N. Watanabe, H. Itozaki
{"title":"Scanning SQUID probe microscope with STM and AFM","authors":"Y. Miyato, Kouhei Hisayama, Y. Matsui, N. Watanabe, H. Itozaki","doi":"10.1109/ISEC.2013.6604263","DOIUrl":"https://doi.org/10.1109/ISEC.2013.6604263","url":null,"abstract":"Scanning SQUID microscopy (SSM) has been developed in some groups to achieve both of the good spatial resolution and quantitative accuracy for magnetic imaging. We have developed scanning SQUID probe microscope using a fine permalloy probe and a high Tc superconducting (HTS) SQUID. The microscope has two modes, a scanning tunneling microscope (STM)-SQUID mode for conductive materials and an atomic force microscope (AFM)-SQUID mode even for insulating ones. The submicron magnetic domains of ferromagnetic thin films, fine magnetic patterns of magnetic hard disk and magneto-optical disk, and so on were clearly observed. The STM-SQUID has achieved the imaging of surface morphology with nanometer scale and magnetic field with submicron scale simultaneously, whereas the AFM-SQUID can achieve the comparable performance to the STM-SQUID even in insulating samples. It indicates that the scanning SQUID probe microscope with STM and AFM has good performance to measure fine magnetic field distribution on both conductor and insulator samples.","PeriodicalId":233581,"journal":{"name":"2013 IEEE 14th International Superconductive Electronics Conference (ISEC)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122178021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Metallic contaminant detection by Faraday's law of electromagnetic induction using high-Tc SQUIDs 基于法拉第电磁感应定律的高温度squid检测金属污染物
2013 IEEE 14th International Superconductive Electronics Conference (ISEC) Pub Date : 2013-07-07 DOI: 10.1109/ISEC.2013.6604310
S. Tanaka, T. Ohtani, T. Kobayashi, T. Chigasaki, Y. Hatsukade, S. Suzuki
{"title":"Metallic contaminant detection by Faraday's law of electromagnetic induction using high-Tc SQUIDs","authors":"S. Tanaka, T. Ohtani, T. Kobayashi, T. Chigasaki, Y. Hatsukade, S. Suzuki","doi":"10.1109/ISEC.2013.6604310","DOIUrl":"https://doi.org/10.1109/ISEC.2013.6604310","url":null,"abstract":"We propose and demonstrate a high-Tc SQUID(Superconducting Quantum Interference Devises) magnetic metallic contaminant detector using Faraday's law of electromagnetic induction for food and industrial products. For manufacturers producing items such as processed food and industrial products, problems with metallic contaminants are critical issues. The lower detection limit for practical X-ray usage is on the order of 1 mm. A detection system using a SQUID is a powerful tool for sensitive inspections. An iron pellet with a size of 40 μm is successfully detected by the proposed system.","PeriodicalId":233581,"journal":{"name":"2013 IEEE 14th International Superconductive Electronics Conference (ISEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115474254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
SQUID instrumentation for early cancer diagnostics 用于早期癌症诊断的SQUID仪器
2013 IEEE 14th International Superconductive Electronics Conference (ISEC) Pub Date : 2013-07-07 DOI: 10.1109/ISEC.2013.6604260
A. Matlashov, P. Magnelind, H. Sandin, M. Espy, Aaron Anderson, H. Mukundan
{"title":"SQUID instrumentation for early cancer diagnostics","authors":"A. Matlashov, P. Magnelind, H. Sandin, M. Espy, Aaron Anderson, H. Mukundan","doi":"10.1109/ISEC.2013.6604260","DOIUrl":"https://doi.org/10.1109/ISEC.2013.6604260","url":null,"abstract":"Ultra-sensitive magnetic detection and imaging of tagged tissue cells using superparamagnetic nanoparticles is a developing technique for disease diagnosis, e.g. early cancer diagnostics. Superconducting quantum interference devices (SQUIDs) are very suitable for such sensitive measurements. Super-paramagnetic relaxometry is used for detection of targeted cells with high specificity, as only bound nanoparticles are detected via Néel relaxation. By combining relaxometry with ultra-low field magnetic resonance imaging (ULF MRI), using the same instrument, the tagged area can be imaged to provide anatomical information and bounds for the inverse problem, as the same magnetic particles work as MRI contrast agents. The combination of ULF MRI and relaxometry could provide both accurate localization and cell count of the tagged tissue, which would enable detection and localization of cancerous tissue at a very early disease stage. We describe our design of such a combined SQUID-based instrument, and present our first experimental results on phantoms.","PeriodicalId":233581,"journal":{"name":"2013 IEEE 14th International Superconductive Electronics Conference (ISEC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124896949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
High linearity voltage response differential cell 高线性电压响应差分电池
2013 IEEE 14th International Superconductive Electronics Conference (ISEC) Pub Date : 2013-07-07 DOI: 10.1109/ISEC.2013.6604307
V. Kornev, N. V. Kolotinsky, V. A. Skripka, O. Mukhanov
{"title":"High linearity voltage response differential cell","authors":"V. Kornev, N. V. Kolotinsky, V. A. Skripka, O. Mukhanov","doi":"10.1109/ISEC.2013.6604307","DOIUrl":"https://doi.org/10.1109/ISEC.2013.6604307","url":null,"abstract":"A cell consisting of two differentially connected parallel arrays are studied in detail, and conditions for high linearity voltage response to magnetic signal are summarized. Specifically, in contrast to an ideal case of zero coupling inductances, the realistic cell has to be based on regular arrays rather than parallel Superconducting Quantum Interference Filters (SQIFs). Optimization of the cell parameters and balancing the load impact are analyzed and discussed.","PeriodicalId":233581,"journal":{"name":"2013 IEEE 14th International Superconductive Electronics Conference (ISEC)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117049731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Wideband microwave low noise amplifiers based on biSQUID SQIFs 基于biSQUID sqif的宽带微波低噪声放大器
2013 IEEE 14th International Superconductive Electronics Conference (ISEC) Pub Date : 2013-07-07 DOI: 10.1109/ISEC.2013.6604298
G. Prokopenko, O. Mukhanov
{"title":"Wideband microwave low noise amplifiers based on biSQUID SQIFs","authors":"G. Prokopenko, O. Mukhanov","doi":"10.1109/ISEC.2013.6604298","DOIUrl":"https://doi.org/10.1109/ISEC.2013.6604298","url":null,"abstract":"We designed, fabricated, and measured broadband low-noise amplifiers based on Superconducting Quantum Interference Filters (SQIFs) for variety of applications ranging from superconducting quantum bits readout to satellite communication receivers. Our microwave amplifiers (Microwave SQAs) are based on 1-, 5-, 10-, 20-cell serial biSQUID SQIF arrays. The RF input is applied via a 50 Ohm coplanar waveguide connected to a superconducting line coupled to each biSQUID cell and integrated with input/output planar capacitors to define and tune up signal frequency bandwidth. The RF output comes out from the central common line via a balanced output circuit matching to a 50 Ohm output coplanar waveguide. The same circuit is used for symmetrical dc biasing of an array. Microwave SQA samples were fabricated on 5 mm × 5 mm chips using standard HYPRES niobium 4.5 kA/cm2 fabrication process. The results of experimental evaluation of our Microwave SQAs based on SQIF serial arrays with different number of biSQUID cells are compared. We have demonstrated a power gain up to 20 dB from 8 to 11 GHz.","PeriodicalId":233581,"journal":{"name":"2013 IEEE 14th International Superconductive Electronics Conference (ISEC)","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116172946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Graphoepitaxial Josephson junctions and DC SQUIDs 石墨外延Josephson结和直流squid
2013 IEEE 14th International Superconductive Electronics Conference (ISEC) Pub Date : 2013-07-07 DOI: 10.1109/ISEC.2013.6604264
M. Faley, D. Meertens, U. Poppe, R. Dunin‐Borkowski
{"title":"Graphoepitaxial Josephson junctions and DC SQUIDs","authors":"M. Faley, D. Meertens, U. Poppe, R. Dunin‐Borkowski","doi":"10.1109/ISEC.2013.6604264","DOIUrl":"https://doi.org/10.1109/ISEC.2013.6604264","url":null,"abstract":"We have prepared high-T<sub>c</sub> superconducting heterostructures for DC SQUIDs with graphoepitaxial step edge Josephson junctions on single crystal MgO substrates and investigated them using complementary characterization techniques, including atomic force microscopy, scanning electron microscopy and high-resolution transmission electron microscopy. Combined epitaxial (out-of-plane) and graphoepitaxial (in-plane) growth of YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-x</sub> (YBCO) films on the tilted surfaces of step edges on MgO substrates was observed. The high-T<sub>c</sub> step-edge Josephson junctions demonstrated a good reproducibility and an I<sub>c</sub>R<sub>n</sub> product of about 600 μV at 77 K. The DC SQUIDs with step edge junctions showed voltage swings δVpp of up to about 60 μV at 77 K. High values of R<sub>n</sub> of the graphoepitaxial step edge Josephson junctions can be advantageous for their applications as qubits.","PeriodicalId":233581,"journal":{"name":"2013 IEEE 14th International Superconductive Electronics Conference (ISEC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116444664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
A tunable high temperature superconducting bandpass filter using semiconductor varactors 采用半导体变容管的可调谐高温超导带通滤波器
2013 IEEE 14th International Superconductive Electronics Conference (ISEC) Pub Date : 2013-07-07 DOI: 10.1109/ISEC.2013.6604296
Chunguang Li, Jia Wang, Y. Bian, Guoqiang Li, Yun Wu, Qiang Zhang, Na Li, Xu Wang, Xueqiang Zhang, Liang Sun, Hong Li, Yusheng He
{"title":"A tunable high temperature superconducting bandpass filter using semiconductor varactors","authors":"Chunguang Li, Jia Wang, Y. Bian, Guoqiang Li, Yun Wu, Qiang Zhang, Na Li, Xu Wang, Xueqiang Zhang, Liang Sun, Hong Li, Yusheng He","doi":"10.1109/ISEC.2013.6604296","DOIUrl":"https://doi.org/10.1109/ISEC.2013.6604296","url":null,"abstract":"A narrow band 4-pole varactor tuned high temperature superconducting (HTS) filter was design and fabricated. The center frequency of the filter can be tuned from 430 MHz to 720 MHz with a direct voltage up to 20V. The return loss is better than 10 dB in the whole tuning range. Insertion loss is in a range of 0.8~3.8 dB with 3dB fractional bandwidth about 3%.","PeriodicalId":233581,"journal":{"name":"2013 IEEE 14th International Superconductive Electronics Conference (ISEC)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127465799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
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