Download or read book The Effect of Disorder and Chemical Substitutions in the Two band Superconductivity of MgB2 written by Andrea Calzolari and published by . This book was released on 2006 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mgb2 Superconducting Wires Basics And Applications written by Rene Flukiger and published by World Scientific. This book was released on 2016-08-10 with total page 667 pages. Available in PDF, EPUB and Kindle. Book excerpt: The compendium gives a complete overview of the properties of MgB2 (Magnesium Diboride), a superconducting compound with a transition temperature of Tc = 39K, from the fundamental properties to the fabrication of multifilamentary wires and to the presentation of various applications. Written by eminent researchers in the field, this indispensable volume not only discusses superconducting properties of MgB2 compounds, but also describes known preparation methods of thin films and of bulk samples obtained under high pressure methods.A unique selling point of the book is the detailed coverage of various applications based on MgB2, starting with MRI magnets and high current cables, cooled by Helium (He) vapor. High current cables cooled by liquid hydrogen are also highlighted as an interesting alternative due to the shrinking He reserves on earth. Other pertinent subjects comprise permanent magnets, ultrafine wires for space applications and wind generator projects.
Download or read book Applied Superconductivity written by Paul Seidel and published by John Wiley & Sons. This book was released on 2015-01-22 with total page 1336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This wide-ranging presentation of applied superconductivity, from fundamentals and materials right up to the details of many applications, is an essential reference for physicists and engineers in academic research as well as in industry. Readers looking for a comprehensive overview on basic effects related to superconductivity and superconducting materials will expand their knowledge and understanding of both low and high Tc superconductors with respect to their application. Technology, preparation and characterization are covered for bulk, single crystals, thins fi lms as well as electronic devices, wires and tapes. The main benefit of this work lies in its broad coverage of significant applications in magnets, power engineering, electronics, sensors and quantum metrology. The reader will find information on superconducting magnets for diverse applications like particle physics, fusion research, medicine, and biomagnetism as well as materials processing. SQUIDs and their usage in medicine or geophysics are thoroughly covered, as are superconducting radiation and particle detectors, aspects on superconductor digital electronics, leading readers to quantum computing and new devices.
Download or read book Radiation Synthesis of Materials and Compounds written by Boris Ildusovich Kharisov and published by CRC Press. This book was released on 2016-04-19 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: Researchers and engineers working in nuclear laboratories, nuclear electric plants, and elsewhere in the radiochemical industries need a comprehensive handbook describing all possible radiation-chemistry interactions between irradiation and materials, the preparation of materials under distinct radiation types, the possibility of damage of material
Download or read book Applications of High Tc Superconductivity written by Adir Luiz and published by BoD – Books on Demand. This book was released on 2011-06-27 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a collection of the chapters intended to study only practical applications of HTS materials. You will find here a great number of research on actual applications of HTS as well as possible future applications of HTS. Depending on the strength of the applied magnetic field, applications of HTS may be divided in two groups: large scale applications (large magnetic fields) and small scale applications (small magnetic fields). 12 chapters in the book are fascinating studies about large scale applications as well as small scale applications of HTS. Some chapters are presenting interesting research on the synthesis of special materials that may be useful in practical applications of HTS. There are also research about properties of high-Tc superconductors and experimental research about HTS materials with potential applications. The future of practical applications of HTS materials is very exciting. I hope that this book will be useful in the research of new radical solutions for practical applications of HTS materials and that it will encourage further experimental research of HTS materials with potential technological applications.
Download or read book Handbook of Superconductivity written by David A. Cardwell and published by CRC Press. This book was released on 2022-07-05 with total page 1088 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first of three volumes of the extensively revised and updated second edition of the Handbook of Superconductivity. The past twenty years have seen rapid progress in superconducting materials, which exhibit one of the most remarkable physical states of matter ever to be discovered. Superconductivity brings quantum mechanics to the scale of the everyday world where a single, coherent quantum state may extend over a distance of metres, or even kilometres, depending on the size of a coil or length of superconducting wire. Viable applications of superconductors rely fundamentally on an understanding of this intriguing phenomena and the availability of a range of materials with bespoke properties to meet practical needs. This first volume covers the fundamentals of superconductivity and the various classes of superconducting materials, which sets the context and background for Volumes 2 and 3. Key Features: Covers the depth and breadth of the field Includes contributions from leading academics and industry professionals across the world Provides hands-on guidance to the manufacturing and processing technologies A comprehensive reference, this handbook is suitable for both graduate students and practitioners in experimental physics, materials science and multiple engineering disciplines, including electronic and electrical, chemical, mechanical, metallurgy and others.
Download or read book Chemical Addition and Superconducting Phase Formation in Magnesium Diboride written by Fang Wan (Ph. D. in materials science) and published by . This book was released on 2020 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: The low-cost, ease-of-fabrication, and intermediate critical temperature (Tc) of 39 K are key factors enabling magnesium diboride (MgB2) conductors be promising for application. However, the most important parameter for evaluating the electrical performance of MgB2 conductors is the critical current density (Jc). For MgB2 strands, the Jc can be discussed in terms of layer Jc, non-barrier Jc, and engineering Je. The aim of this dissertation is to explore effective routes to enhance the Jcs and Jes of MgB2 conductors, which requires a solid understanding of how superconducting properties are related with microstructure, band scattering, and phase formation in MgB2. Previous studies have shown that the Jcs of MgB2 bulks and layer Jcs of MgB2 strands, which are determined by intrinsic properties of MgB2, can be improved through increases of Bc2/Birr and the density (grain connectivity) of the MgB2 phase. On the other hand, the Jes of MgB2 strands can be further improved by increasing the area fraction of MgB2 relative to the whole strand because Je = layer Jc × A(MgB2)/A(strand) , where A(MgB2) and A(strand) are the transverse cross-sectional area of MgB2 and the transverse cross-sectional area of whole strand, respectively. While the non-barrier Jcs and layer Jcs are identical for powder-in-tube (PIT) in-situ MgB2 strands, the non-barrier Jcs of advanced-internal-magnesium-infiltration (AIMI) MgB2 strands can also be improved by increasing layer Jcs and the MgB2 area fractions within chemical barrier because non-barrier Jc=layer Jc × A(MgB2)/Anb, where Anb is the area within chemical barrier. Chapter 2 summarizes the sample preparation and experimental testing utilized in this dissertation were summarized. Chapter 3 focuses on chemical addition methods including both pure C doping as well as C/Dy2O3 co-addition to improve the non-barrier Jcs (layer Jcs) of PIT in-situ MgB2 strands via increased Bc2/Birr and decreased Bc2 anisotropy. Here C doping was accomplished using pre-C-doped B powders. The doping effects of two types of B powders, SMI B and PVZ B, were compared in terms of the 4.2 K non-barrier Jcs of multifilamentary PIT in-situ strands. By adding 0 ~ 6 wt% Dy2O3 into the 2 mol% C-doped MgB2 strand, non-barrier Jcs with acceptable values were achieved over a wide temperature range of 4.2 to 25 K. The relationship between Bc2 enhancement and band scatterings was investigated. In Chapter 4, a vapor-solid reaction route was established with the aim of increases the area fraction of MgB2 layer in AIMI strands. Moreover, the vapor-solid reaction was also demonstrated to generate MgB2 layers with high levels of uniformity in 18-filamentary AIMI strands. Consequently, high Jes and n-values were achieved by the vapor-solid reacted strands. In Chapter 5, the micron-sized B powders were used to synthesize large-size MgB2 tubes for passive shielding applications The Jcm of 108 A/cm2 was achieved by the best tube at 4.2 K, 1 T. The DC/AC external fields of 0.67 T/1.75 T were completely shielded by the tube at 4.2 K. Long-distance Mg infiltration into B compact and well-connected MgB2 phases were simultaneously obtained using a heat-treatment of 900 oC/36 h.
Download or read book Low Dimensional Solids written by Duncan W. Bruce and published by John Wiley & Sons. This book was released on 2011-03-29 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: With physical properties that often may not be described by the transposition of physical laws from 3D space across to 2D or even 1D space, low-dimensional solids exhibit a high degree of anisotropy in the spatial distribution of their chemical bonds. This means that they can demonstrate new phenomena such as charge-density waves and can display nanoparticulate (0D), fibrous (1D) and lamellar (2D) morphologies. This text presents some of the most recent research into the synthesis and properties of these solids and covers: Metal Oxide Nanoparticles Inorganic Nanotubes and Nanowires Biomedical Applications of Layered Double Hydroxides Carbon Nanotubes and Related Structures Superconducting Borides Introducing topics such as novel layered superconductors, inorganic-DNA delivery systems and the chemistry and physics of inorganic nanotubes and nanosheets, this book discusses some of the most exciting concepts in this developing field. Additional volumes in the Inorganic Materials Book Series: Molecular Materials Functional Oxides Porous Materials Energy Materials All volumes are sold individually or as comprehensive 5 Volume Set.
Download or read book High Temperature Superconductors written by Raghu N. Bhattacharya and published by John Wiley & Sons. This book was released on 2011-08-24 with total page 267 pages. Available in PDF, EPUB and Kindle. Book excerpt: This essential reference provides the most comprehensive presentation of state-of-the-art research being conducting worldwide today in this growing field of research and applications. HTS are currently being supported by numerous governmental and industrial initiatives in the USA and Asia and Europe to overcome energy distribution issues and are now being commercialised for power-delivery devices, such as power transmission lines and cables, motors, and generators. Applications in electric utilities include energy-storing devices to help industries avoid dips in electric power, current limiters, and long transmission lines. The technology is particularly thought out for highly-populated and densed areas. Both editors are leading experts in the field from the National Renewable Energy Laboratory and the Oak Ridge National Laboratory. This book can be used as a companion teaching tool, and also as as a research and professional reference.
Download or read book Vortices and Nanostructured Superconductors written by Adrian Crisan and published by Springer. This book was released on 2017-07-19 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides expert coverage of modern and novel aspects of the study of vortex matter, dynamics, and pinning in nanostructured and multi-component superconductors. Vortex matter in superconducting materials is a field of enormous beauty and intellectual challenge, which began with the theoretical prediction of vortices by A. Abrikosov (Nobel Laureate). Vortices, vortex dynamics, and pinning are key features in many of today’s human endeavors: from the huge superconducting accelerating magnets and detectors at the Large Hadron Collider at CERN, which opened new windows of knowledge on the universe, to the tiny superconducting transceivers using Rapid Single Flux Quanta, which have opened a revolutionary means of communication. In recent years, two new features have added to the intrinsic beauty and complexity of the subject: nanostructured/nanoengineered superconductors, and the discovery of a range of new materials showing multi-component (multi-gap) superconductivity. In this book, leading researchers survey the most exciting and important recent developments in the field. Topics covered include: the use of scanning Hall probe microscopy to visualize interactions of a single vortex with pinning centers; Magneto-Optical Imaging for investigating what vortex avalanches are, why they appear, and how they can be controlled; and the vortex interactions responsible for the second magnetization peak. Other chapters discuss nanoengineered pinning centers of vortices for improved current-carrying capabilities, current anisotropy in cryomagnetic devices in relation to the pinning landscape, and the new physics associated with the discovery of new superconducting materials with multi-component superconductivity. The book offers something for almost everybody interested in the field: from experimental techniques to visualize vortices and study their dynamics, to a state-of-the-art theoretical microscopic approach to multicomponent superconductivity.
Download or read book Two gap Superconductivity in MgB2 written by Marco Monni and published by . This book was released on 2006 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book MgB2 Superconducting Wires written by Rene Flukiger and published by World Scientific Series in Applications of Superconductivity and Related Phenomena. This book was released on 2016 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: The compendium gives a complete overview of the properties of MgB2 (Magnesium Diboride), a superconducting compound with a transition temperature of Tc = 39K, from the fundamental properties to the fabrication of multifilamentary wires and to the presentation of various applications. Written by eminent researchers in the field, this indispensable volume not only discusses superconducting properties of MgB2 compounds, but also describes known preparation methods of thin films and of bulk samples obtained under high pressure methods. A unique selling point of the book is the detailed coverage of various applications based on MgB2, starting with MRI magnets and high current cables, cooled by Helium (He) vapor. High current cables cooled by liquid hydrogen are also highlighted as an interesting alternative due to the shrinking He reserves on earth. Other pertinent subjects comprise permanent magnets, ultrafine wires for space applications and wind generator projects.
Download or read book Chemical Substitution and High Pressure Effects on Superconductors in the LnOBiS 2 Ln written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A large number of compounds which contain BiS$_2$ layers exhibit enhanced superconductivity upon electron doping. Much interest and research effort has been focused on BiS$_2$-based compounds which provide new opportunities for exploring the nature of superconductivity. Important to the study of BiS2-based superconductors is the relation between structure and superconductivity. By modifying either the superconducting BiS$_2$ layers or the blocking layers in these layered compounds, one can effectively tune the lattice parameters, local atomic environment, electronic structure, and other physical properties of these materials. In this article, we will review some of the recent progress on research of the effects of chemical substitution in BiS$_2$-based compounds, with special attention given to the compounds in the LnOBiSS$_2$ (Ln = La-Nd) system. Strategies which are reported to be essential in optimizing superconductivity of these materials will also be discussed.
Download or read book Studies of High Temperature Superconductors Superconducting Magnesium Diboride written by A. V. Narlikar and published by . This book was released on 2002 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microwave Analysis of Unconventional Superconductors with Coplanar Resonator Techniques written by Gianluca Ghigo and published by Springer Nature. This book was released on 2022-01-29 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Influence of Chemical Doping on Microstructures and Superconducting Properties of MgB2 Wires and Bulk Samples written by Yuan Yang and published by . This book was released on 2016 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnesium diboride (MgB2) is a material with a superconducting transition temperature of 39 K. Discovered in 2001, the relatively large coherence length (and associated lack of weak links) together with its simple binary composition (making phase pure formation relatively easy) have made it a material of substantial interest. However, its inadequate in-field performance limits the high field applications. Chemical doping is the key to increasing the Bc2 of MgB2. Chemical doping aiming at Mg site or B site substitution is of interest and both routes are explored in this thesis. Structure-property correlations are developed for dopants that either do or do not, incorporate themselves into the MgB2 matrix. First, the effects of C doping in the state of art MgB2 wires were investigated. In order to do so, a series of state of the art C doped MgB2 wires, in both mono-filamentary and multi-filamentary forms, were fabricated by a local company. Their transport and magnetic performance in various magnetic fields, and mechanical induced degradation, were examined. The C doping influence on the critical current density and the n-values were discussed. Secondly, the effects of rare earth oxide (REO) doping in MgB2 were studied. Two sets of samples including both bulk samples and wires were fabricated. Microstructural evidence obtained by SEM and TEM proved that nano-size inclusions formed after REO doping acted as grain growth inhibitors, as evidenced a reduction of MgB2 grain size in REO doped bulk samples. The results of XRD and magnetic measurements on the bulk samples demonstrated that Dy2O3 and Nd2O3 do not alloy with MgB2, no changes being observed in the lattice parameters, Tc and Bc2 of doped MgB2. Enhancements in flux pinning and Jc were obtained in both bulk samples and wires by REO doping, consistent with the microstructural evidence of notable grain refinements and the presence of nano-size inclusions as new pinning sites in MgB2 grains. Lastly, a set of metal diboride and Dy2O3 added MgB2 bulk samples were synthesized at very high temperatures and pressures (up to 1700°C and 10 MPa) to explore solubility limits of dopant species in MgB2 and enhance diffusion during the sample synthesis. The microstructure was studied by XRD, EDS, TEM and STEM, and doping the influence of doping on superconducting properties were investigated by magnetic measurement. The chemical doping induced changes in microstructure and properties of MgB2 bulk samples were discussed.
Download or read book Two band Superconductivity in MgB2 Thin Films written by Valeria Ferrando and published by . This book was released on 2005 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt:
