Zobrazeno 1 - 10
of 93
pro vyhledávání: '"J. R. Gavaler"'
Publikováno v:
Journal of Applied Physics. 81:6292-6296
A capacitively coupled interdigital probe technique is described whereby the electrical characteristics of thin films at arbitrary frequencies in the range from about 100 kHz to beyond 1 GHz may be studied. Patterning of the film, deposition of elect
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 5:3401-3404
We report the fabrication and quasi-static testing of a two-stage, high-temperature superconducting, Single Flux Quantum shift register. The five-junction circuit was fabricated using a single YBCO film, with step-edge grain boundary junctions. Stora
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 5:3139-3142
The passive structures required for HTS digital circuits that must be formed at high temperature (650-750/spl deg/C) were evaluated by fabricating crossovers, vias, YBCO/YBCO contacts, and multiple coverage of steps with trilayer structures of YBCO/e
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 5:1173-1176
Data on bulk YBa/sub 2/Cu/sub 3/O/sub 7-x/ (YBCO) have shown that optimum critical temperatures are obtained in material that has less than the maximum (stoichiometric) oxygen content, x=0. We have prepared films of YBCO that were over doped with oxy
Publikováno v:
Journal of Applied Physics. 70:4383-4391
The critical parameters in the single‐target magnetron sputtering of YBa2Cu3O7 have been identified and sufficiently optimized to allow the reproducible deposition of films with Tc’s of ≳90 K and Jc’s of ≫ 106 A/cm2 at 77 K. It was found th
Publikováno v:
IEEE Transactions on Magnetics. 27:978-981
The authors have developed techniques for the in situ deposition of epitaxial YBCO films on 2-in-diameter wafers of LaAlO/sub 3/
Publikováno v:
IEEE Transactions on Magnetics. 27:3098-3101
All-high-T/sub c/ Josephson junctions have been fabricated in a planar SNS geometry by bridging narrow gaps ( approximately=0.1-0.2 mu m) in epitaxial YBa/sub 2/Cu/sub 3/O/sub 7/ (YBCO) films with Au. The resulting devices exhibit a variety of nonhys
Publikováno v:
IEEE Transactions on Magnetics. 27:1280-1283
Surface acoustic wave attenuation measurements have been performed in a screen room on a superconducting film of Nb at 659 MHz and on a high-T/sub c/ film of YBa/sub 2/Cu/sub 3/O/sub 7/ at 168 MHz. The attenuation in the Nb film is due to electron-ph
Publikováno v:
Applied Physics Letters. 65:1835-1837
Multilevel high Tc SQUIDs, suitable for digital circuit applications, have been fabricated and tested. The devices employ a YBa2Cu3O7−δ (YBCO) ground plane, an epitaxial SrTiO3 insulator, and a YBCO microstrip layer. Junctions are formed by the st
Autor:
M.R. Schrote, J. Talvacchio, K.M. Leader, A. Y. Piatnicia, M.A. Janocko, S.H. Talisa, J.A. Moellers, J. R. Gavaler, M. J. Buckley
Publikováno v:
1993 IEEE MTT-S International Microwave Symposium Digest.
The benefits of using thin-film high-temperature superconducting (HTS) matching networks for electrically short monopole antennas are demonstrated. Their performance was compared with that of similar matching networks made with gold, showing an effic