Applied Superconductivity最新文献_第2页

Transient noise simulations of RSFQ cells RSFQ细胞的瞬态噪声模拟

Applied Superconductivity Pub Date : 1999-10-01 DOI: 10.1016/S0964-1807(99)00021-6

H. Töpfer , T.V. Filippov , F.H. Uhlmann

引用次数: 18

Single cooper pair electronics 单铜对电子学

Applied Superconductivity Pub Date : 1999-10-01 DOI: 10.1016/S0964-1807(98)00062-3

V. Bouchiat , D. Vion , P. Joyez, D. Esteve, C. Urbina, M.H. Devoret

引用次数: 4

Index 指数

Applied Superconductivity Pub Date : 1999-10-01 DOI: 10.1016/S0964-1807(99)00054-X

引用次数: 0

Theory of rf SQUIDS operating at 77 K 在77 K下工作的射频squid理论

Applied Superconductivity Pub Date : 1999-10-01 DOI: 10.1016/S0964-1807(99)00050-2

Boris Chesca

引用次数: 0

A SQUID measurement system for immunoassays 用于免疫分析的SQUID测量系统

Applied Superconductivity Pub Date : 1999-10-01 DOI: 10.1016/S0964-1807(99)00014-9

H Matz , D Drung , S Hartwig , H Groß , R Kötitz , W Müller , A Vass , W Weitschies , L Trahms

{"title":"A SQUID measurement system for immunoassays","authors":"H Matz , D Drung , S Hartwig , H Groß , R Kötitz , W Müller , A Vass , W Weitschies , L Trahms","doi":"10.1016/S0964-1807(99)00014-9","DOIUrl":"10.1016/S0964-1807(99)00014-9","url":null,"abstract":"<div>A SQUID measurement system is presented that was developed for analysis of antigen–antibody reactions in fluid samples. The detection method is based on the signal generated by the remanent or relaxing magnetization of nanoparticles which are attached as labels to the antibodies. The measurement system involves two 7.2-mm-diameter multiloop SQUID chip magnetometers (type W7A) with a typical field noise of √<math><mtext>S</mtext><msub><mi></mi><mn>B</mn></msub></math>=1.5 fT/√<math><mtext>Hz</mtext></math> arranged as an electronic gradiometer with a baseline of 160mm. It is embedded in a liquid helium dewar with a tail bottom allowing 6mm distance between SQUID and room temperature. A sophisticated direct-coupled read-out-electronics was realized with a bandwidth of 8MHz. The read-out-electronics can be reset within τR ⩽0.5 μs. A 2 channel control unit was developed which enables environmental noise reduction. Data are acquired by a PC-controlled 8 channel system with 16-bit resolution and a maximum sampling frequency of fs=196 kHz. First measurements are presented.</div>","PeriodicalId":100110,"journal":{"name":"Applied Superconductivity","volume":"6 10","pages":"Pages 577-583"},"PeriodicalIF":0.0,"publicationDate":"1999-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0964-1807(99)00014-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79474253","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: 69

YBaCuO/Co-doped PrBaCuO/YBaCuO ramp-edge junctions and their application to flip–flop circuits YBaCuO/共掺杂PrBaCuO/YBaCuO斜坡边结及其在触发器电路中的应用

Applied Superconductivity Pub Date : 1999-10-01 DOI: 10.1016/S0964-1807(99)00052-6

Shinji Inoue, Tatsunori Hashimoto, Toshihiko Nagano, Jiro Yoshida

{"title":"YBaCuO/Co-doped PrBaCuO/YBaCuO ramp-edge junctions and their application to flip–flop circuits","authors":"Shinji Inoue, Tatsunori Hashimoto, Toshihiko Nagano, Jiro Yoshida","doi":"10.1016/S0964-1807(99)00052-6","DOIUrl":"10.1016/S0964-1807(99)00052-6","url":null,"abstract":"<div>We fabricated YBa2Cu3O7−x/PrBa2Cu2.8Co0.2O7−y/YBa2Cu3O7−x ramp-edge Josephson junctions and measured their current–voltage (I–V) characteristics. Critical current (Ic) and conductance (G) were evaluated as a function of the barrier layer thickness, and both of them exhibited a nearly exponential dependence. The decay parameters for Ic and G were estimated to be 1.1 and 1.5nm, respectively. We also examined superconducting quantum interference devices (SQUIDs) using this type of junction as a preliminary test for realizing oxide superconductive integrated circuits with high-speed operation. DC SQUIDs with direct-coupling control lines and no ground plane were fabricated and their loop inductance was evaluated. The obtained SQUID inductance ranged from 8 to 38pH for a 4-μm-wide, 3- to 12-μm-long hole in a rectangular SQUID loop. In addition, a flip–flop circuit based on such a dc SQUID was fabricated. Both flux trapping and flux detrapping in the SQUID loop hole were confirmed when 1-ms-wide current pulses were injected into the SQUID loop.</div>","PeriodicalId":100110,"journal":{"name":"Applied Superconductivity","volume":"6 10","pages":"Pages 843-847"},"PeriodicalIF":0.0,"publicationDate":"1999-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0964-1807(99)00052-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78401026","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: 0

Phonon-cooled hot-electron bolometric mixer: overview of recent results 声子冷却热电子热计量混频器:最新研究成果综述

Applied Superconductivity Pub Date : 1999-10-01 DOI: 10.1016/S0964-1807(99)00024-1

Gregory N. Gol’tsman, Eugene M. Gershenzon

引用次数: 4

Ion-beam etching of substrate steps: SNS compared to step-edge grain boundary Josephson-junctions 基板台阶的离子束刻蚀:与台阶边缘晶界josephson结的比较

Applied Superconductivity Pub Date : 1999-10-01 DOI: 10.1016/S0964-1807(99)00036-8

C. Francke, A. Krämer, M. Offner, R. Strade, L. Mex, J. Müller

{"title":"Ion-beam etching of substrate steps: SNS compared to step-edge grain boundary Josephson-junctions","authors":"C. Francke, A. Krämer, M. Offner, R. Strade, L. Mex, J. Müller","doi":"10.1016/S0964-1807(99)00036-8","DOIUrl":"10.1016/S0964-1807(99)00036-8","url":null,"abstract":"<div>For “SNS step and gap”, and for “step-edge grain boundary”, Josephson-junctions steep steps in the substrate are needed to get either a break in the YBa2Cu3O7-film (SNS) or to induce grain boundaries in the growth of the YBa2Cu3O7-film across the step (step-edge).We report on the influence of the profiles of ion-beam etched substrate steps in MgO and SrTiO3 on the growth of YBa2Cu3O7-films at the step-edges and on the electrical properties of the different Josephson-junction types. On MgO we have fabricated Josephson-junctions of the SNS-type (using Ag as “N”), while for the step-edge junctions SrTiO3 was used. Both types of junctions exhibit Josephson-effects at 77K. For the steps we use photoresist AZ 5214 E with steep edges as the mask. Atomic force microscopy (AFM) and transmission electron microscopy (TEM) analysis on differently fabricated steps are presented and compared to the electrical properties of patterned YBa2Cu3O7-films grown on them. Especially the role of material redeposited at the edge of a step during ion-beam etching is discussed. The reproducible step edge profiles are reflected in reproducible electrical properties of the Josephson-junctions and dc-SQUIDs (on chip and chip to chip).</div>","PeriodicalId":100110,"journal":{"name":"Applied Superconductivity","volume":"6 10","pages":"Pages 735-739"},"PeriodicalIF":0.0,"publicationDate":"1999-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0964-1807(99)00036-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74372285","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

A survey of phase-locking in the dc and ac-driven Josephson transmission line 直流和交流驱动约瑟夫森传输线锁相研究

Applied Superconductivity Pub Date : 1999-10-01 DOI: 10.1016/S0964-1807(99)00004-6

M. Cirillo

引用次数: 0

Modeling the nonlinear surface impedance of high-Tc thin films 高tc薄膜的非线性表面阻抗建模

Applied Superconductivity Pub Date : 1999-10-01 DOI: 10.1016/S0964-1807(99)00008-3

D.E. Oates , Y. Habib , C. Lehner , J. Herd , R. Ono , L. Vale

引用次数: 2