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Optics. Quantum optics --- Electromagnetism. Ferromagnetism --- Thermal properties of solids --- Inorganic chemistry --- supergeleiding --- anorganische chemie --- magnetisme --- microwaves
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This book addresses new ways to optimize the fabrication process and performance of iron-based superconducting wires and tapes based on the powder-in-tube (PIT) method. Further, it systemically analyzes and enhances the current-carrying ability of wire and tape conductors with regard to chemical addition, mechanical deformation, and heat treatment. The microstructure of the superconducting cores is studied by means of the magneto-optical imaging technique, high-resolution transmission electron microscopy, and flux pinning analysis. This book will benefits all students, researchers, and technical personnel who work in superconducting materials, applied superconductivity, and the power industry.
Optics. Quantum optics --- Electromagnetism. Ferromagnetism --- Thermal properties of solids --- Inorganic chemistry --- supergeleiding --- anorganische chemie --- magnetisme --- microwaves
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This book covers the flux pinning mechanisms and properties and the electromagnetic phenomena caused by the flux pinning common for metallic, high-Tc and MgB2 superconductors. The condensation energy interaction known for normal precipitates or grain boundaries and the kinetic energy interaction proposed for artificial Nb pins in Nb-Ti, etc., are introduced for the pinning mechanism. Summation theories to derive the critical current density are discussed in detail. Irreversible magnetization and AC loss caused by the flux pinning are also discussed. The loss originally stems from the ohmic dissipation of normal electrons in the normal core driven by the electric field induced by the flux motion. The influence of the flux pinning on the vortex phase diagram in high Tc superconductors is discussed, and the dependencies of the irreversibility field are also described on other quantities such as anisotropy of superconductor, specimen size and electric field strength. Recent developments of critical current properties in various high-Tc superconductors and MgB2 are introduced. The 3rd edition has been thoroughly updated, with a new chapter on critical state model. The mechanism of irreversible properties is discussed in detail. The author provides calculations of pinning loss by the equation of motion of flux lines in the pinning potential and hysteresis loss. The readers will learn why the resultant loss is of hysteresis type in spite of such mechanism. This book aims for graduate students and researchers studying superconductivity as well as engineers working in electric utility industry.
Thermodynamics --- Thermal properties of solids --- Solid state physics --- Physics --- supergeleiding --- koude --- fysica --- Flux pinning.
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This book includes the synthesis, analysis and characterization of nanomaterials that are an important ingredient in nanotechnologies. Nanomaterials contain nanoparticles, smaller than 100 nanometers in at least one dimension. Nanomaterials are coming into use in health care, electronics, cosmetics and other areas. Their physical and chemical properties differ from those of bulk materials. This needs to cover health risks to workers and potential risks to environment. This is currently done on a case-by-case basis, but risk assessment methods need to be kept up to date as the use of nanomaterials expands, especially as they find their way into consumer products. This book covers the basics to advanced applications of nanomaterials and provides a useful resource for researchers and professionals in the field.
Optics. Quantum optics --- Thermal properties of solids --- Chemical structure --- Electrical engineering --- Biotechnology --- supergeleiding --- nanotechniek --- quantumchemie --- biotechnologie --- Nanostructured materials. --- Nanotechnology. --- Nanoparticles.
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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.
Thermal properties of solids --- Solid state physics --- Spectrometric and optical chemical analysis --- Electronics --- Telecommunication technology --- supergeleiding --- tekstverwerking --- elektronica --- fysica --- spectrometrie
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This book presents comprehensive studies of charge density waves (CDW) in a high-Tc cuprate superconductor using x-ray scattering techniques under uniaxial pressure. Specifically, the work addresses inelastic x-ray scattering studies under uniaxial pressure performed on the underdoped cuprate YBa2Cu3O6.67(p=0.12, Tc=65K) with incoming photon energy in the resonant (E=931.3 eV, Cu-L3 edge) and non-resonant conditions (E=17.794 keV). This is a completely new approach to the investigation of charge density waves. It revealed new features of charge density waves in cuprates, whose properties had previously been inaccessible.
Thermal properties of solids --- Solid state physics --- Chemical and physical crystallography --- Rocks. Minerals --- supergeleiding --- kristallografie --- fysica --- kristallen
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Mathematical physics --- Thermal properties of solids --- Solid state physics --- Physics --- Surface chemistry --- Electronics --- supergeleiding --- vaste stof --- materie (fysica) --- oppervlakte-onderzoek --- theoretische fysica --- wiskunde --- fysica --- halfgeleiders --- fysicochemie
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This thesis makes significant advances towards an understanding of superconductivity in the cuprate family of unconventional, high-temperature superconductors. Even though the high-temperature superconductors were discovered over 35 years ago, there is not yet a general consensus on an acceptable theory of superconductivity in these materials. One of the early proposals suggested that collective magnetic excitations of the conduction electrons could lead them to form pairs, which in turn condense to form the superconducting state at a critical temperature Tc. Quantitative calculations of Tc using experimental data were, however, not available to verify the applicability of this magnetic mechanism. In this thesis, the author constructed an angle-resolved photoemission apparatus that could provide sufficiently accurate data of the electronic excitation spectra of samples in the normal state, data which was furthermore unusually devoid of any surface contamination. The author also applied the Bethe-Salpeter method to his uncommonly pristine and precise normal state data, and was able to predict the approximate superconducting transition temperatures of different samples. This rare combination of experiment with sophisticated theoretical calculations leads to the conclusion that antiferromagnetic correlations are a viable candidate for the pairing interaction in the cuprate superconductors.
Thermal properties of solids --- Theoretical spectroscopy. Spectroscopic techniques --- supergeleiding --- spectroscopie --- Superconductivity. --- Superconductors. --- Superconductors --- Spectrum analysis. --- Quantum electrodynamics. --- Spectroscopy. --- Quantum Electrodynamics, Relativistic and Many-body Calculations. --- Chemistry.
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