Advances In Superconductivity Ix

Author : Sadao Nakajima,Masato Murakami
Publisher : Springer
Page : 696 pages
File Size : 43,9 Mb
Release : 1997-09
Category : Science
ISBN : CORNELL:31924084288483

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Advances in Superconductivity IX by Sadao Nakajima,Masato Murakami Pdf

C axis Current I ~ . The (11 0) thick homoepitaxial film of 320 nm -------~ ~-=-=--==---==--==--==--- shows a very good surface flatness, which --------·· sJ;1 0] suggests the unique (110) atomic plane helps 2- A [1 1 OJ dimensional epitaxial growth of YBCO films, and shows excellent high Tc. The resultant 1. 0 surface morphology of YBCO is quite different Q ,. -- R(270)=1. 60 m 0 from the (110) heteroepitaxial films of similar 0 0. 0 " thickness [11). In the case of heteroepitaxy ~ . ,,_. 1. 0 irrespective of c-axis [ 12] or a-axis oriented ~ ~. . ,. R(270)=3. 71 m 0 films [5), only thin films show flat surfaces, g 0. 0 . . Tc=92. 3K "' which, however, give usually a degraded Tc due -~ 1. 0 v v I - to lattice mismatching. In conclusion, we have ::1. ,. . . . . R(270)=31. 9 mO succeeded to grow high-quality (11 0) YBCO ~ YBCO film . . Tc=90. 7 K 0. 0 ·;:: YBCO(IIO) 1 0 ·d·--~ YBCO thinfilms on (11 0) YBCO single crystal § substrate ~Xtt=u 1. 0 substra substrates with very flat surfaces and high Tc's. :£ R(270)=40. 1 m 0 0. 0 LLLLL. J. . . . LL~. t-J' L-Tc=9LWO. L-! L-K LLLLL. . . . L. . I. . . . l. . . . L. L. L. J. . . . . L. L. l. . . J 50 100 150 200 250 300 0 ACKNOWLEDGMENTS Temperature (K) One of the authors (T. U. ) would like to thank Fig.

Author : N. Koshizuka,S. Tajima
Publisher : Springer Science & Business Media
Page : 1566 pages
File Size : 41,8 Mb
Release : 2013-11-11
Category : Technology & Engineering
ISBN : 9784431668749

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Advances in Superconductivity XI by N. Koshizuka,S. Tajima Pdf

The 11th International Symposium on Superconductivity was held November 16-19, 1998, in Fukuoka, Japan. Convened annually since 1988, the symposium covers the whole field of superconductivity from fundamental physics and chemistry to new applications. At the 11th Symposium, there was increased interest reported in the development of trial devices using bismuth wires and yttrium-based bulk materials. Among the presentations were those that clearly defined the development targets for next-generation yttrium-based wires and bulk materials and single-flux quantum (SFQ) circuits. Other popular topics were high-temperature superconductivity applications such as SQUIDs, microwave filters, and cryocooler-cooled magnets. With more than 600 participants from 18 countries, the symposium provided an excellent forum for exchanges of the most recent information in the field of superconductivity.

Author : Kozo Osamura,Izumi Hirabayashi
Publisher : Springer Science & Business Media
Page : 1478 pages
File Size : 49,5 Mb
Release : 2013-11-11
Category : Technology & Engineering
ISBN : 9784431668794

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Advances in Superconductivity X by Kozo Osamura,Izumi Hirabayashi Pdf

The International Symposium on Superconductivity, which has been held annu ally since 1988, is a forum for presenting the most up-to-date information about a broad range of research and development in superconductivity, from funda mental aspects to applications. More than 10 years have passed since the discovery of oxide superconductors and since various developments of applications began. It may be said that the prospects for application of oxide superconductors recently have opened up. Great progress has been made toward practical use, for example, of the flywheel, which uses bulk materials, and the high-performance cryo-cooled magnet made of bismuth wire. These were the results of persistent efforts to develop materials from the viewpoint of materials science and engineering. Also important is the progress in comprehensive understanding of high temperature superconductivity. Unique electronic properties of cuprates such as the non-Fermi liquid normal state, spin-charge separation, spin gap, and d-wave symmetry were discussed at the symposium, as were the unique electromagnetic properties resulting from the low dimensionality of cuprates. In the field of new superconductors, many exotic materials have been discovered since 1986. A decade of work with cuprate superconductors is reviewed in this proceedings, and several of the newest materials are presented. These papers will be instructive for many researchers and for students who are to enter this field.

Author : Anonim
Publisher : Unknown
Page : 874 pages
File Size : 45,8 Mb
Release : 1997
Category : Superconductivity
ISBN : CORNELL:31924084288491

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Advances in Superconductivity IX by Anonim Pdf

Author : Koji Kajimura,Hisao Hayakawa
Publisher : Springer Science & Business Media
Page : 1312 pages
File Size : 52,9 Mb
Release : 2012-12-06
Category : Technology & Engineering
ISBN : 9784431681410

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Advances in Superconductivity III by Koji Kajimura,Hisao Hayakawa Pdf

Since the discovery of high temperature superconductors, many new materials have been invented. In the last year, several new materials were also discovered, but their critical temperatures are still below lOOK. Precise physical and chemical work has made tremendous progress in the theoretical and experimental study of physical properties and carrier state characterizations. The de Haas van Alphen effect measurement showed the existence of a Fermi surface in YBCO. Flux dynamics is a well-known new problem in which flux creep and irreversibility line features are especially important for a fundamental understanding of the critical current and flux pinning. Flux pinning centers which are intentionally added using non-superconducting precipitates, neutrons, and protons, etc. increase critical currents to practical levels. The analysis of electric and magnetic properties are expected to reveal the pinning mechanism and also to further application development. As for wires and bulks, many melt-like sintering techniques have improved the material performance of critical current densities. A new seeding Quench-Melt Growth technique enlarged crystal size and increased the repulsion force. These melting processes, in conjunction with a mechanical strength improvement have been effectively introduced into wire fabrication in order to realize kilometer range wires and will put the oxide wires to practical use. Where thin film is con cerned, when many fabrication methods had been developed using the assistance effect of activated oxygen such as ozone and oxygen radicals, a high current 2 density of 106A/cm at 77K was reported.

Author : T. Yamashita,K. Tanabe
Publisher : Springer Science & Business Media
Page : 1162 pages
File Size : 54,7 Mb
Release : 2013-11-11
Category : Technology & Engineering
ISBN : 9784431668770

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Advances in Superconductivity XII by T. Yamashita,K. Tanabe Pdf

The 12th International Symposium on Superconductivity was held in Morioka, Japan, October 17-19, 1999. Convened annually since 1988, the symposium covers the whole field of superconductivity from fundamental physics and chemistry to a variety of applications. At the 12th Symposium, a mini-symposium focusing on the two-dimensionality of high-temperature superconductors, or the c-axis transport, and a session on vortex physics were organized. There were also many reports on the recent developments of YBCO-based coated conductors both in the United States and in Japan, AC losses of wires and tapes, developments of bulk materials with strong flux pinning, the recent progress in thin film and junction technologies, and the demonstration of various electronics applications using SQUIDs, microwave devices, and single-flux-quantum (SFQ) digital devices. This volume is a valuable resource for all those working in the field of superconductivity.

Author : Koji Kajimura,Hisao Hayakawa
Publisher : Springer
Page : 1320 pages
File Size : 40,5 Mb
Release : 1991-06-12
Category : Technology & Engineering
ISBN : 4431700714

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Advances in Superconductivity III by Koji Kajimura,Hisao Hayakawa Pdf

Since the discovery of high temperature superconductors, many new materials have been invented. In the last year, several new materials were also discovered, but their critical temperatures are still below lOOK. Precise physical and chemical work has made tremendous progress in the theoretical and experimental study of physical properties and carrier state characterizations. The de Haas van Alphen effect measurement showed the existence of a Fermi surface in YBCO. Flux dynamics is a well-known new problem in which flux creep and irreversibility line features are especially important for a fundamental understanding of the critical current and flux pinning. Flux pinning centers which are intentionally added using non-superconducting precipitates, neutrons, and protons, etc. increase critical currents to practical levels. The analysis of electric and magnetic properties are expected to reveal the pinning mechanism and also to further application development. As for wires and bulks, many melt-like sintering techniques have improved the material performance of critical current densities. A new seeding Quench-Melt Growth technique enlarged crystal size and increased the repulsion force. These melting processes, in conjunction with a mechanical strength improvement have been effectively introduced into wire fabrication in order to realize kilometer range wires and will put the oxide wires to practical use. Where thin film is con cerned, when many fabrication methods had been developed using the assistance effect of activated oxygen such as ozone and oxygen radicals, a high current 2 density of 106A/cm at 77K was reported.

Author : G Celotti,A Tampieri
Publisher : World Scientific
Page : 370 pages
File Size : 48,7 Mb
Release : 2000-05-12
Category : Technology & Engineering
ISBN : 9789814493154

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Superconducting Materials: Advances In Technology And Applications - Proceedings Of The International Advanced School "Leonardo Da Vinci" - 1998 Summer Course by G Celotti,A Tampieri Pdf

This volume consists of lectures highlighting fundamentals of advances in superconducting materials, related technologies and applications. Theory, fundamental aspects, advances in materials synthesis, processing and properties are featured, as well as current developments of superconducting components and devices.Both HTC and LTC superconducting materials are discussed. Several years after the discovery of high Tc superconductivity and a multinational effort in its study, this book collects the main results on the subject and presents a state-of-the-art view of the correlations between crystal chemistry and physical properties.

Author : Koji Kajimura,Hisao Hayakawa
Publisher : Springer
Page : 1320 pages
File Size : 49,6 Mb
Release : 1992-06-26
Category : Technology & Engineering
ISBN : 4431681434

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Advances in Superconductivity III by Koji Kajimura,Hisao Hayakawa Pdf

Since the discovery of high temperature superconductors, many new materials have been invented. In the last year, several new materials were also discovered, but their critical temperatures are still below lOOK. Precise physical and chemical work has made tremendous progress in the theoretical and experimental study of physical properties and carrier state characterizations. The de Haas van Alphen effect measurement showed the existence of a Fermi surface in YBCO. Flux dynamics is a well-known new problem in which flux creep and irreversibility line features are especially important for a fundamental understanding of the critical current and flux pinning. Flux pinning centers which are intentionally added using non-superconducting precipitates, neutrons, and protons, etc. increase critical currents to practical levels. The analysis of electric and magnetic properties are expected to reveal the pinning mechanism and also to further application development. As for wires and bulks, many melt-like sintering techniques have improved the material performance of critical current densities. A new seeding Quench-Melt Growth technique enlarged crystal size and increased the repulsion force. These melting processes, in conjunction with a mechanical strength improvement have been effectively introduced into wire fabrication in order to realize kilometer range wires and will put the oxide wires to practical use. Where thin film is con cerned, when many fabrication methods had been developed using the assistance effect of activated oxygen such as ozone and oxygen radicals, a high current 2 density of 106A/cm at 77K was reported.

Author : A. V. Narlikar
Publisher : Nova Publishers
Page : 476 pages
File Size : 42,5 Mb
Release : 1993
Category : Technology & Engineering
ISBN : 1560721324

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Studies of High Temperature Superconductors by A. V. Narlikar Pdf

Six papers by physicists from the Japan, India, Brazil and the US address some of the broad frontal issues of superconductivity, which include the mechanisms of high-temperature superconductivity, extra-high-temperature phenomena, the normal state pseudogap, the observations of the isotope effect in a host of different superconducting systems and their explanations, and the unusual features of strongly correlated electron systems like heavy fermions. Two extended papers explore the importance of positron annihilation and using electron spin resonance techniques to study superconducting materials. The treatments should be accessible to working scientists and engineers and to graduate students of physics, chemistry, materials science, solid-state electronics, and other disciplines.

Author : Oliver A. Chang
Publisher : Nova Publishers
Page : 220 pages
File Size : 46,5 Mb
Release : 2008
Category : Science
ISBN : 1600216943

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Progress in Superconductivity Research by Oliver A. Chang Pdf

This book presents state-of-the art research on superconductivity which is the ability of certain materials to conduct electrical current with no resistance and extremely low losses. High temperature superconductors, such as La2-xSrxCuOx (Tc=40K) and YBa2Cu3O7-x (Tc=90K), were discovered in 1987 and have been actively studied since. In spite of an intense, world-wide, research effort during this time, a complete understanding of the copper oxide (cuprate) materials is still lacking. Many fundamental questions are unanswered, particularly the mechanism by which high-Tc superconductivity occurs. More broadly, the cuprates are in a class of solids with strong electron-electron interactions. An understanding of such "strongly correlated" solids is perhaps the major unsolved problem of condensed matter physics with over ten thousand researchers working on this topic.

Author : Kōji Kajimura
Publisher : Unknown
Page : 1320 pages
File Size : 47,5 Mb
Release : 1991-01-01
Category : Superconductivity
ISBN : 3540700714

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Advances in Superconductivity III by Kōji Kajimura Pdf

Author : J. Deaver,B.S. Deaver,J. Ruvalds
Publisher : Springer Science & Business Media
Page : 527 pages
File Size : 47,5 Mb
Release : 2013-06-29
Category : Technology & Engineering
ISBN : 9781461399544

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Advances in Superconductivity by J. Deaver,B.S. Deaver,J. Ruvalds Pdf

The Advanced Study Institute on "Advances in Superconductivity" was held at the Ettore Majorana Centre for Scientific Culture in Erice, Sicily, during July 3 to July 15, 1982. This Institute was the third course of the International School of Low Tempera ture Physics, which was established at the Centre in 1977 with the guidance and inspiration of T. Regge and A. Zichichi. The 1982 Course was centered on a topic which brought together fundamental basic research and the most recent promising technological applications. Accordingly, the participants represented a wide spectrum of industrial and government laboratories, as well as universities from various countries. The program of topics and speakers was developed with the advice of the Organizing Committee, composed of H. Frohlich, T. Regge, B. Stritzker, and L. Testardi. This Institute emphasized recent developments in the science and technology of superconductivity. A historical perspective was provided by H. Frohlich, whose lectures recall the earliest discoveries and theoretical attempts to understand superconductivity. Ironically, his early suggestion of the electron-phonon coupling as a key to superconductivity was met with initial widespread skepticism. Later, the development of field theory methods for solid state physics problems, and the evolution of the BCS theory has led to a seemingly unanimous concensus regarding the e1ectron phonon mechanism as the predominant source of superconductivity in known materials. Experimental studies of superconductivity exemplify the strong interplay of science and technology in many ways.

Author : D Andreone,R S Gonelli,E Mezzetti
Publisher : World Scientific
Page : 365 pages
File Size : 42,5 Mb
Release : 1993-03-30
Category : Electronic
ISBN : 9789814553407

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Advances In High Temperature Superconductivity by D Andreone,R S Gonelli,E Mezzetti Pdf

Author : Yoshichika Bando,Hisao Yamauchi
Publisher : Springer Science & Business Media
Page : 1319 pages
File Size : 51,5 Mb
Release : 2012-12-06
Category : Science
ISBN : 9784431683056

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Advances in Superconductivity V by Yoshichika Bando,Hisao Yamauchi Pdf

This book covers all research fields in high Tc Superconductivity. Breakthrougs in the single crystal growth of a monolithic device leads to a new technology.