Microwave Characterization of High-Tc Superconductors PDF Download
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Author: Timothy Alan Mahl
Publisher:
ISBN:
Category :
Languages : en
Pages : 186
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Book Description
Author: Timothy Alan Mahl
Publisher:
ISBN:
Category :
Languages : en
Pages : 186
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Book Description
Author: Alan D. MacDonald
Publisher:
ISBN:
Category : High temperature superconductors
Languages : en
Pages : 190
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 12
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Book Description
Thick (10-15 [mu]m) Tl-Ba-Ca-Cu-O films have been deposited onto yttria-stabilized zirconia and Ag substrates by d.c. magnetron sputtering techniques. Direct deposition onto 1'' diameter yttria-stabilized zirconia yields films with typical 22 GHz surface resistance (R{sub s}) values of 5.2 {plus minus} 2 m[Omega] and 52 {plus minus} 2 m[Omega] at 10 K and 77 K, respectively. For comparison, R{sub s} of Cu at this same frequency is 10 m[Omega] at 4 K and 22 m[Omega] at 77 K. Tl-Ba-Ca-Cu-O films have also been deposited onto 1'' diameter Ag substrates using Au/Cu, Cu, and BaF2 buffer layers. The lowest R{sub s} values were obtained on films with a BaF2 buffer layer, typical values being 7.8 {plus minus} 2 m[Omega] and 30.6 {plus minus} 2 m[Omega] (measured at 22 GHz) at 10 K and 77 K, respectively. Larger films (1.5'' diameter) with similar R{sub s} values were prepared using this same technique, demonstrating that the fabrication process can be scaled to larger surface areas. These films are promising for radiofrequency cavity applications because they are thick (50-75 times the London penetration depth), have relatively large surface areas, are fabricated on metallic substrates, and have R{sub s} values that are competitive with Cu at 77 K and are lower than Cu at 4 K. Because they are polycrystalline and unoriented, it is anticipated that their R{sub s} values can be lowered by improving the processing technique. High-quality films of YBa2Cu3O-- have been electron-beam deposited onto 1'' LaGaO3 and 1.5'' LaAlO3 substrates. The 1'' sample is characterized by R{sub s} values of 0.2 {plus minus} 0.1 m[Omega] at 4 K and 18.6 {plus minus} 2 m[Omega] at 77 K. The 4-K value is only 2-4 times higher than Nb. The 1.5'' sample has R{sub s} values (measured at 18 GHz) of 0.93 {plus minus} 2 m[Omega] and 71 {plus minus} 3 m[Omega] at 10 K and 77 K, respectively. 18 refs., 8 figs.
Author: Sridhar Kanamaluru
Publisher:
ISBN:
Category :
Languages : en
Pages : 142
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Book Description
Author: John J. Pouch
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 706
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Book Description
This collection of papers describes the synthesis, properties, characteristics and applications of the recently discovered high-temperature superconductors. Results of research activities around the world are presented.
Author: Matthias Hein
Publisher: Springer Science & Business Media
ISBN: 9783540656463
Category : Technology & Engineering
Languages : en
Pages : 422
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Book Description
The book develops a comprehensive understanding of the surface impedance of the oxide high-temperature superconductors in comparison with the conventional superconductor Nb3Sn. Linear and nonlinear microwave responses are treated separately, both in terms of models, theories or numerical approaches and in terms of experimental results. The theoretical treatment connects fundamental aspects of superconductivity to the specific high-frequency properties. The experimental data review the state of the art, as reported by many international groups. The book describes further the main features of appropriate preparation, handling, mounting, and refrigeration techniques, and finally discusses possible applications in passive and active microwave devices.
Author: Thamer Mousa Badarneh
Publisher:
ISBN:
Category : High temperature superconductors
Languages : en
Pages : 120
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Book Description
Author: H. Weinstock
Publisher: Springer Science & Business Media
ISBN: 9401004501
Category : Technology & Engineering
Languages : en
Pages : 622
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Book Description
Detailed coverage of all aspects of microwave superconductivity: fundamentals, fabrication, measurement, components, circuits, cryogenic packaging and market potential. Both a graduate-level textbook and a reference for microwave engineers. Applications (with either active or passive circuit elements) include those at both liquid-helium and liquid-nitrogen temperatures. Topics covered include wireless communications, space-based cryoelectronics, SQUIDs and SQUID amplifiers, NMR and MRI coils, accelerator cavities, and Josephson flux-flow devices.
Author: J.J. Pouch
Publisher: Trans Tech Publications Ltd
ISBN: 3035704740
Category : Technology & Engineering
Languages : en
Pages : 710
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Book Description
This collection of papers describes the synthesis, properties, characteristics and applications of the recently discovered high-temperature superconductors. Results of research activities around the world are presented.
Author: Gianluca Ghigo
Publisher: Springer Nature
ISBN: 3030939103
Category : Technology & Engineering
Languages : en
Pages : 109
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Book Description
This book provides a thorough overview of methods and approaches to the experimental characterization of superconductors at microwave frequencies, and includes a detailed description of the two main techniques, both based on the use of coplanar waveguide resonators, that the authors employed to investigate the properties of unconventional superconductors. In the second part several case studies are described, covering a large spectrum of materials and issues. Particular emphasis is given to recent hot topics concerning iron-based superconductors, both of fundamental nature and relevant for applications. The book is intended as a learning tool for researchers in the field, and serves as a guide providing inspiring examples of the use of coplanar resonator techniques to address key topics in the field of unconventional superconductivity.
