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Ferroelectrics-on-Superconductor Devices: Phased-Array Radar and 10–100 GHz Devices

  • Chapter
Ferroelectric Memories

Part of the book series: Springer Series in Advanced Microelectronics ((MICROELECTR.,volume 3))

Abstract

The first invention using high-T c superconductors on ferroelectric films (or high-dielectric paraelectric materials such as strontium titanate or BST that are nearly ferroelectric) were from the University of Colorado group involving Hermann, Yandrofski, Price, Barnes, and Scott [464, 465, 466]. These devices (Figs. 13.1 and 13.2) incorporated the superconductor merely as a ground plane, with the ferroelectric film in transverse geometry (interdigitalized electrodes, no field across the film thickness) and a micro-stripline configuration (Figs. 13.3 and 13.4) [467]. The fundamental advantage of such devices was in their ability to provide very large phase shifts (> 25%) at very low voltages, and to operate in the 10–20 GHz regime at low loss (Q > 1000, loss tangent < 1%) [468]. Prior to this work, ferroelectrics had traditionally been viewed as unsuitable for microwave devices [469]. Hermann’s group successfully fabricated devices on both YBCO (Yttrium Barium Copper Oxide) and the thallium-based high-T c superconductors. A variety of devices were made and characterized by Galt, Price, and Ono [470].

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Authors and Affiliations

  1. Centre for Ferroics, Earth Sciences Dept., Cambridge University, Downing Street, Cambridge, CB2 3EQ, England

    Professor James F. Scott

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  1. Professor James F. Scott
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© 2000 Springer-Verlag Berlin Heidelberg

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Scott, J.F. (2000). Ferroelectrics-on-Superconductor Devices: Phased-Array Radar and 10–100 GHz Devices. In: Ferroelectric Memories. Springer Series in Advanced Microelectronics, vol 3. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-04307-3_13

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  • DOI: https://doi.org/10.1007/978-3-662-04307-3_13

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-08565-9

  • Online ISBN: 978-3-662-04307-3

  • eBook Packages: Springer Book Archive

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