Applied Superconductivity最新文献_第7页

Metal/ferroelectric/superconductor field effect transistor using Pb(Zr0.52Ti0.48)O3/(Y0.6Pr0.4)Ba2Cu3O7-y heterostructures 采用Pb(Zr0.52Ti0.48)O3/(Y0.6Pr0.4)Ba2Cu3O7-y异质结构的金属/铁电/超导体场效应晶体管

Applied Superconductivity Pub Date : 1998-07-01 Epub Date: 1999-08-18 DOI: 10.1016/S0964-1807(98)00079-9

Shigeki Hontsu , Junya Ishii , Masaya Nakamori , Hitoshi Tabata , Tomoji Kawai , Akira Fujimaki

{"title":"Metal/ferroelectric/superconductor field effect transistor using Pb(Zr0.52Ti0.48)O3/(Y0.6Pr0.4)Ba2Cu3O7-y heterostructures","authors":"Shigeki Hontsu , Junya Ishii , Masaya Nakamori , Hitoshi Tabata , Tomoji Kawai , Akira Fujimaki","doi":"10.1016/S0964-1807(98)00079-9","DOIUrl":"10.1016/S0964-1807(98)00079-9","url":null,"abstract":"<div>Metal(Al,Ag,Au)/ferroelectric (Pb(Zr0.52Ti0.48)O3 [PZT])/high-Tc superconductor ((Y1-x Prx)Ba2Cu3O7-y [YPBCO]) structures have been fabricated by ArF excimer laser deposition. Ferroelectric properties of c-axis oriented epitaxial PZT films on YBa2Cu3O7-y[YBCO]//SrTiO33(100) have been studied as a function of temperature in the range of 20–290<!--> K. Samples with three kinds of metal electrode show almost similar ferroelectric properties at 290 K. The remanent polarization and coercive field are about 25 μC/cm2 and 146 kV/cm, respectively. At low temperature, on the contrary, the ferroelectric properties of heterostructures were strongly influenced by the choice of the electrode metal. It seems that these properties are severely affected by interface states of metal PZT. The Au electrode gives rise to the best ferroelectric property of PZT films. We also investigated the ferroelectric field effect in the heterostructures of Au/ PZT/(Y0.6Pr0.4)Ba2Cu3O7-y. A large modulation (as much as ∼40%) and memory effects are observed in the low frequency source–drain current response to a pulsed voltage.</div>","PeriodicalId":100110,"journal":{"name":"Applied Superconductivity","volume":"6 7","pages":"Pages 367-372"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0964-1807(98)00079-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75918434","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

Noise simulation of the un SQUID un SQUID的噪声模拟

Applied Superconductivity Pub Date : 1998-07-01 Epub Date: 1999-08-18 DOI: 10.1016/S0964-1807(98)00081-7

M. Kiviranta, H. Seppä

引用次数: 6

Electrical properties of Y1Ba2Cu3Ox films grown by liquid phase epitaxy 液相外延生长Y1Ba2Cu3Ox薄膜的电学性能

Applied Superconductivity Pub Date : 1998-07-01 Epub Date: 1999-08-18 DOI: 10.1016/S0964-1807(98)00108-2

S Miura, K Hashimoto, T Inoue, K Muranaka, J.G Wen, K Suzuki, Y Enomoto, T Morishita

{"title":"Electrical properties of Y1Ba2Cu3Ox films grown by liquid phase epitaxy","authors":"S Miura, K Hashimoto, T Inoue, K Muranaka, J.G Wen, K Suzuki, Y Enomoto, T Morishita","doi":"10.1016/S0964-1807(98)00108-2","DOIUrl":"10.1016/S0964-1807(98)00108-2","url":null,"abstract":"<div>Y1Ba2Cu3Ox films were grown on MgO(100) substrates by liquid phase epitaxy and their structural and electrical properties were examined. From transmission electron microscopy (TEM) plan-view images, it was found that the films consisted of large grains whose misorientation angles were less than 1°. Although d.c. critical current density values decreased with increasing film thickness, even a 7 μm-thick film showed the value of 9×105 A/cm2 at 77K. An rf first penetration field of the film is estimated to be 30 Oe at 10.8 GHz and 77K, by using a microstrip line resonator with a resonant frequency of 10.8 GHz. The third-order intercept point of the resonator is at an input power of +43 dBm and output power of +30 dBm at 77K. These results suggest that LPE grown Y1Ba2Cu3Ox films have superior d.c. and rf electrical properties.</div>","PeriodicalId":100110,"journal":{"name":"Applied Superconductivity","volume":"6 7","pages":"Pages 409-415"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0964-1807(98)00108-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78748282","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

Josephson mechanism in random telegraph voltage noise in high-Tc superconductors 高温超导体随机电报电压噪声中的约瑟夫森机制

Applied Superconductivity Pub Date : 1998-07-01 Epub Date: 1999-08-18 DOI: 10.1016/S0964-1807(98)00084-2

G Jung , B Savo

引用次数: 0

Development of planar thin film HTSC–SQUID gradiometers for different applications 用于不同应用的平面薄膜HTSC-SQUID梯度仪的研制

Applied Superconductivity Pub Date : 1998-07-01 Epub Date: 1999-08-18 DOI: 10.1016/S0964-1807(98)00076-3

L Dörrer , S Wunderlich , F Schmidl , H Schneidewind , U Hübner , P Seidel

{"title":"Development of planar thin film HTSC–SQUID gradiometers for different applications","authors":"L Dörrer , S Wunderlich , F Schmidl , H Schneidewind , U Hübner , P Seidel","doi":"10.1016/S0964-1807(98)00076-3","DOIUrl":"10.1016/S0964-1807(98)00076-3","url":null,"abstract":"<div>We investigated the main dependencies of the gradient resolution of planar galvanometer superconducting quantum interference device (SQUID) gradiometers made of YBa2Cu3O7-x (YBCO). We focussed especially on the influence of antenna layout and the parameters of the galvanometer SQUID such as effective and parasitic areas on the performance of the gradiometer and the behavior in an unshielded environment. The efficiency (that is, the quotient of effective area to inductance) of different geometries of antennas will be compared. Some aspects of the layout of the galvanometer SQUIDs are discussed in terms of parasitic area and best current resolution. Special problems due to the use of bicrystal Josephson junctions in gradiometers for operation in highly disturbed environment are shown. Step-edge Josephson junctions can offer alternative concepts. Reached gradient sensitivity values in the white noise region are 0.46 pT/(cm/<math><mtext>H</mtext></math>z) in the case of bicrystal junctions and 0.69 pT/(cm/<math><mtext>H</mtext></math>z) for step-edge junctions.</div>","PeriodicalId":100110,"journal":{"name":"Applied Superconductivity","volume":"6 7","pages":"Pages 349-354"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0964-1807(98)00076-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75553420","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

Numerical simulation for digital applications of a coupled-SQUID gate with d.c.-biasing 直流偏置耦合squid栅极数字应用的数值模拟

Applied Superconductivity Pub Date : 1998-07-01 Epub Date: 1999-08-18 DOI: 10.1016/S0964-1807(98)00107-0

Yoshinao Mizugaki, Koji Nakajima

引用次数: 1

Spatially resolved detection of phase locking in Josephson junction arrays 约瑟夫逊结阵列锁相的空间分辨检测

Applied Superconductivity Pub Date : 1998-07-01 Epub Date: 1999-08-18 DOI: 10.1016/S0964-1807(98)00060-X

M Keck , T Doderer , R.P Huebener , T Traeuble , R Dolata , T Weimann , J Niemeyer

{"title":"Spatially resolved detection of phase locking in Josephson junction arrays","authors":"M Keck , T Doderer , R.P Huebener , T Traeuble , R Dolata , T Weimann , J Niemeyer","doi":"10.1016/S0964-1807(98)00060-X","DOIUrl":"10.1016/S0964-1807(98)00060-X","url":null,"abstract":"<div>Two-dimensional arrays of shunted Nb/AlOx/Nb Josephson junctions have been investigated. Shapiro steps in the current–voltage (I–V) curve of an on-chip detector junction can be used to sense mutual phase locking of the array junctions. By scanning the array with a low-power electron beam, the phase locked junctions remain locked, whereas the unlocked junctions generate a beam-induced additional voltage drop along the array. In regions of the array’s bias current where pronounced Shapiro steps occur in the detector’s I–V curve, practically no array junction generates a beam-induced voltage signal, thus indicating complete mutual locking. For other bias currents of the array with less than maximum detected power, some of the junctions generate beam-induced signals, and can be identified as being non-locked. Our investigations allow a detailed and spatially resolved analysis of mutual phase locking in arrays of Josephson junctions. Moreover, the results obtained with autonomous arrays are compared to experiments performed with injection locked arrays.</div>","PeriodicalId":100110,"journal":{"name":"Applied Superconductivity","volume":"6 7","pages":"Pages 297-301"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0964-1807(98)00060-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85395120","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

Effect of Mo and Mo-Ca substitution on the superconductivity of GdBa2Cu3O7−δ Mo和Mo- ca取代对GdBa2Cu3O7−δ超导性的影响

Applied Superconductivity Pub Date : 1998-07-01 Epub Date: 1999-08-18 DOI: 10.1016/S0964-1807(98)00121-5

Amish G. Joshi, M.V. Subbarao, Shah Nikesh A, D.G. Kuberkar, R.G. Kulkarni

{"title":"Effect of Mo and Mo-Ca substitution on the superconductivity of GdBa2Cu3O7−δ","authors":"Amish G. Joshi, M.V. Subbarao, Shah Nikesh A, D.G. Kuberkar, R.G. Kulkarni","doi":"10.1016/S0964-1807(98)00121-5","DOIUrl":"10.1016/S0964-1807(98)00121-5","url":null,"abstract":"<div>The structural and superconducting properties of (Gd1−yCay)Ba2(Cu1−xMox)3Oz samples are investigated using X-ray diffraction, A.C. susceptibility, electrical resistivity and oxygen content measurements. The effect of increasing the Mo concentration in GdBa2(Cu1−xMox)3Oz changes the structure from orthorhombic to tetragonal, accompanied by an increase in the normal state resistivity and decreases both the oxygen content and Tc, which is attributed to hole filling by Mo. This suppression in Tc has been compensated for by appropriate hole doping with Ca, for instance in the oxide (Gd1−yCay)Ba2(Cu0.92Mo0.08)3Oz, the Tc increases from 27K (y=0.0) to 86.5K (y=0.24, compensated oxide), closer to the value of 91K for pure GdBa2Cu3O7−δ due to the balance between the hole filling by Mo and hole doping by Ca.</div>","PeriodicalId":100110,"journal":{"name":"Applied Superconductivity","volume":"6 7","pages":"Pages 471-481"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0964-1807(98)00121-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81664676","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

Development of a 100 milli-kelvin electronic refrigerator based on a normal-insulator-superconductor tunnel junction 基于正常绝缘体-超导隧道结的100毫开尔文电子制冷机的研制

Applied Superconductivity Pub Date : 1998-07-01 Epub Date: 1999-08-18 DOI: 10.1016/S0964-1807(98)00072-6

Philip A. Fisher, Joel N. Ullom , Michael Nahum

引用次数: 3

1 GHz clock operation of Josephson RAMs 1 GHz时钟操作的约瑟夫森RAMs

Applied Superconductivity Pub Date : 1998-07-01 Epub Date: 1999-08-18 DOI: 10.1016/S0964-1807(98)00113-6

Shuichi Nagasawa, Hideaki Numata, Yoshihito Hashimoto, Shuichi Tahara

引用次数: 1