high temperature superconductor microwave devices

... operate SiC devices at temperatures as high as 500–600 C, while Si is generally limited to 125 C While the foregoing discussion highlights the advantage of SiC over Si for hightemperature applications, ... Particularly relevant to high- temperature environments is the bandgap energy of SiC At room temperature, the bandgap of 4H-SiC (the most attractive SiC polytype for electronic devices) is 3.23 eV ... cmÀ3 temperature, K Greek Symbols l characteristic phonon wave length, m u sound velocity, m/s Despite the ability of SiC power devices to operate at elevated temperatures as compared to Si devices, ...

Ngày tải lên: 06/05/2014, 08:53

... High- Temperature Superconductor Microwave Devices Neeraj Khare 11 High- Temperature Superconducting IR Detectors John C Brasunas 12 Cryocoolers and High- Tc Devices Ray Radebaugh 13 High- Temperature Superconductor ... in High- Temperature Superconductors László Béla Kish Noise in High- Temperature Superconductor Josephson Junctions J.C Macfarlane, L Hao, and C.M Pegrum High- Temperature RF SQUIDS V I Shnyrkov High- Temperature ... Pandey, S N Sahu, and S Chandra Bismuth-Based High- Temperature Superconductors, edited by Hiroshi Maeda and Kazumasa Togano Handbook of High- Temperature Superconductor Electronics, edited by Neeraj...

Ngày tải lên: 27/06/2014, 15:20

... results Phonon Spectra of High Temperature Superconductor 54 An attempt has been made in this paper to study phonon frequencies in Bi2Sr2Ca2Cu3O10 high temperature superconductor in the frame ... the high Tc superconductors have been performed for mainly two purposes The first was to calculate the electron-phonon interaction and its influence on the increased transition temperature for high ... frequencies using normal coordinate analysis is given in Table for (2:2:2:3:10) superconductors Phonon Spectra of High Temperature Superconductor 58 Table 1: Bond distances and force constants for Bi2Sr2Ca2Cu3O10...

Ngày tải lên: 07/08/2014, 14:20

... High- Temperature Superconductor Microwave Devices Neeraj Khare 11 High- Temperature Superconducting IR Detectors John C Brasunas 12 Cryocoolers and High- Tc Devices Ray Radebaugh 13 High- Temperature Superconductor ... in High- Temperature Superconductors László Béla Kish Noise in High- Temperature Superconductor Josephson Junctions J.C Macfarlane, L Hao, and C.M Pegrum High- Temperature RF SQUIDS V I Shnyrkov High- Temperature ... Pandey, S N Sahu, and S Chandra Bismuth-Based High- Temperature Superconductors, edited by Hiroshi Maeda and Kazumasa Togano Handbook of High- Temperature Superconductor Electronics, edited by Neeraj...

Ngày tải lên: 10/08/2014, 19:20

... also been synthesized under high pressure, showing a transition temperature of 97 K (19) 1.3 CRYSTAL STRUCTURE OF HIGH- Tc SUPERCONDUCTORS The structure of a high- Tc superconductor is closely related ... Rights Reserved Introduction to High- Temperature Superconductors description of high- Tc superconductors in the form of bulk and thick films The preparation of high- Tc thin films is given in more ... For low-Tc superconductors, this behavior is exhibited, in general, by alloys and compounds On the other hand, all highTc superconductors behave as type II superconductors For high- Tc superconductors,...

Ngày tải lên: 10/08/2014, 19:20

... substrate, one must choose substrates that can withstand the high- temperature solutions of YBa2Cu3O7 at temperatures as high as 1000°C The growth temperature for liquid-phase epitaxy of YBa2Cu3O7 can ... from the film during the high- temperature anneal When annealed at an oxygen pressure of atm, the formation of c-axis-oriented YBa2Cu3O7 films is limited to annealing temperatures T Ͼ 830°C and ... conditions have high critical current densities, indicating strong flux pinning due to the presence of microstructural defects In contrast, films that are processed at very high temperatures (ϳ900°C)...

Ngày tải lên: 10/08/2014, 19:20

... insulating layer should be highly resistive at operating temperatures It should also be thermally stable at a deposition temperature as high as 800°C and not be poisonous to superconductors or N-layer ... nature of high- temperature superconductor materials, mismatch in the lattice and thermal expansion coefficient between the superconductor and N-layer, chemical incompatibility between the superconductor ... progress in the fabrication of high- temperature superconducting ramp-edge SNS junctions and SQUIDs Copyright © 2003 by Marcel Dekker, Inc All Rights Reserved High- Temperature Superconducting Ramp-Edge...

Ngày tải lên: 10/08/2014, 19:20

... instead, obtained on (110)-oriented perovskites As a general rule, low substrate temperature, high oxygen pressure, and high deposition rates during film deposition favor in-plane alignment of the ... Rights Reserved Step-Edge Josephson Junctions 115 FIGURE 4.10 High- temperature TEM image of the GB formed at the bottom edge of a high- angle LaAlO3 step (From Ref 22.) FIGURE 4.11 (a) Sketch of ... have been proposed to account for the transport properties of grain boundaries in high critical temperature superconductors Among them, we have the mechanism based on the structural properties...

Ngày tải lên: 10/08/2014, 19:20

... All Rights Reserved Conductance Noise in High- Tc Superconductors 153 5.3.1.1 “Bulk” Temperature Regime At the high- temperature part of the conductorn superconductor transition region, when the ... random, stochastic process Conductance noise of a superconductor material, either in the conductor superconductor transition temperature region or in the superconductor state, is a nontrivial issue, ... in High- Tc Superconductors 161 noise C(T) In certain temperature regions, the ␥ of HTSC materials can be orders of magnitude greater than that of metals and semiconductors As a consequence, temperature...

Ngày tải lên: 10/08/2014, 19:20

... specific properties of real high- Tc superconductors Copyright © 2003 by Marcel Dekker, Inc All Rights Reserved High- Temperature RF SQUIDS 213 Due to higher operating temperature for the SQUIDs, ... and dissipation in high temperature superconductors IEEE Trans Magnetics M-27:828–832, 1991 R Gross, L Alff, A Beck, OM Froehlich, D Koelle A Max Physics and technology of high temperature superconducting ... Rights Reserved High- Temperature RF SQUIDS 199 7.3 SMALL FLUCTUATION LIMIT FOR HIGH- Tc RF SQUIDs Superconducting rings, coils, and transformers are essential elements of all highTc superconducting...

Ngày tải lên: 10/08/2014, 19:20

... superconducting quantum interference devices Rev Mod Phys 71:631–686, 1999 AK Gupta, N Khare High Tc SQUIDs : a review In: AV Narlikar, ed Studies of High Temperature Superconductors, Vol 12 New York: ... frequency below about MHz (162), a microwave source of frequency up to 12.5 GHz at 77 K (178), and a microwave source at room temperature (176) For an imaging microwave field at 77 K, a spatial ... for the microwave source at room temperature, the SQUID-to-sample separation was 80 ␮m (176) The high- Tc SQUID microscope has also been used for different investigations of samples at room temperature, ...

Ngày tải lên: 10/08/2014, 19:20

... a high- temperature superconductor rapid single flux quantum comparator Appl Phys Lett 72:2328–2330, 1998 K Saito, Y Soutome, F Tokuumi, Y Tarutani, K Takagi Voltage divider operation using high- Tc ... Circuit design for a high- Tc Josephson sampler IEEE Trans Appl Supercond As-5:3353–3356, 1995 M Hidaka, T Satoh, M Koike, S Tahara High- resolution measurement by a high- Tc superconductor sampler ... YBCO and at temperatures not significantly higher The obvious choices for insulators are the substrate materials High- quality STO films can be grown at temperatures similar to those used for depositing...

Ngày tải lên: 10/08/2014, 19:20

... of various high- Tc superconductor microwave passive devices such as resonators, filters, antenna, delay lines, phase shifters, tunable devices, and microwave subsystems 10.2 HIGH- Tc SUPERCONDUCTOR ... Substrates for High- Tc Microwave Devices For high- Tc film microwave devices, the substrate should not only support growth of good quality epitaxial high- Tc films but also its microwave properties ... in high- Tc superconductor- based filters The motivation has been to develop higher-order high- Tc Copyright © 2003 by Marcel Dekker, Inc All Rights Reserved High- Tc Superconductor Microwave Devices...

Ngày tải lên: 10/08/2014, 19:20

... Lee High- temperature- superconducting magnetic susceptibility bolometer J Appl Phys 71:3639–3641, 1992 VY Zerov, VN Leonov, MV Sosnenko, JA Khrebtov, AA Ivanov A new type of high- temperature superconductor ... ROOM -TEMPERATURE HTS DETECTORS High- quality HTS films typically have a metallic temperature dependence on the resistance above Tc, therefore, it is a straightforward proposition to make a roomtemperature ... the high temperatures necessary for HTS film fabrication Also, the thermal expansion mismatch will lead to cracking when the film and substrate are cycled from deposition temperature to room temperature...

Ngày tải lên: 10/08/2014, 19:20

... Reserved Cryocoolers and High- Tc Devices 381 TABLE 12.1 Requirements for Cryocooling High- Tc Superconducting Electronic Devices Requirement Low cost High reliability High efficiency Low EMI Low ... cooling high- temperature superconductors and liquid helium is used for the cooling of low -temperature superconductors Copyright © 2003 by Marcel Dekker, Inc All Rights Reserved Cryocoolers and High- Tc ... Electronic applications of high- temperature superconductors generally require refrigeration powers less than about 10 W for temperatures between about 60 and 80 K Occasionally temperatures down to...

Ngày tải lên: 10/08/2014, 19:20

... 426 Tanaka 13.2 MICROWAVE FILTERS High- Tc superconductor microwave filters and low-noise amplifiers for mobile telephone base stations have been the first commercialized devices in HTS electronics ... to develop a high- quality AD converter of 200 MHz and 16 bits using very high- speed SFQ circuits 13.3 SQUID The SQUID is the most well-known superconducting device and it has a high sensitivity ... fields in a sample with high accuracy; thus, it is possible to observe the distribution of magnetic flux Copyright © 2003 by Marcel Dekker, Inc All Rights Reserved High- Tc Superconductor Electronics:...

Ngày tải lên: 10/08/2014, 19:20

... Many other superconductors with higher critical temperature had since been discovered These new superconductors with relatively high critical temperature are often referred to as High Tc Superconductor ... substrate must be inert at high temperature due to the high deposition temperature required during YBCO thin film fabrication For the fabrication of microwave devices with low microwave dissipation, ... 1957 [5] Z Y Shen, High- Temperature Superconducting Microwave Circuits, Artech House, Inc., 1994 [6] M J Lancaster, Passive Microwave Device Applications of High- Temperature Superconductors, Cambridge...

Ngày tải lên: 16/09/2015, 08:30

Ngày tải lên: 29/06/2014, 09:21

... increased yields when the reaction is performed at high temperatures; (e) the reactions kinetics are faster at high temperatures; (f) enzymatic processing at temperatures near or above 100 °C minimizes ... and mesophilic proteins at room temperature and increases with temperature, so as to allow for enzymatic activity near 100 °C It is only upon achieving these high temperatures that sufficient molecular ... extremely high pressure [7] Recently discovered hyperthermophiles have been observed to grow at temperatures as high as 121 °C [8] Interestingly, hyperthermophilic microorganisms not grow below temperatures...

Ngày tải lên: 07/03/2014, 05:20

... comments High Frequency and Microwave Engineering has been written with a view to ease of understanding and to provide knowledge for any engineer who is interested in high frequency and microwave ... encouragement in the writing of this book Da Silva Prelims 15:2:2001 9:33 am Page iii High Frequency and Microwave Engineering E da Silva The Open University OXFORD AUCKLAND BOSTON JOHANNESBURG ... work The book commences with an explanation of the many terms used in radio, wireless, high frequency and microwave engineering These are explained in Chapter Chapter provides a gentle introduction...

Ngày tải lên: 18/04/2014, 12:24