Magnesium Diboride (MgB2) Superconductor Research.

Intro -- MAGNESIUM DIBORIDE (MGB2) SUPERCONDUCTOR RESEARCH -- MAGNESIUM DIBORIDE (MGB2) SUPERCONDUCTOR RESEARCH -- CONTENTS -- PREFACE -- Chapter 1 MGB2 SUPERCONDUCTOR RESEARCH -- Abstract -- Introduction -- 1. MgB2 Crystal Structure -- 2. Electronic Structure of MgB2 -- 3. Superconducting Mechanism in MgB2 -- 4. Mg-B System Phase Diagram -- 5. MgB2 Crystal Growth -- 6. Polycrystal Preparation of MgB2 -- 7. Thin Film of MgB2 [60] -- 8. Mgb2 Nanomaterials -- 9. Element Doped MgB2 -- 10. Applications -- References -- Chapter 2 SYNTHETIC AND PHENOMENOLOGICAL APPROACHES TO 2 DIMENSIONAL HIGH-TC SUPERCONDUCTIVITY IN THE LAYERED CUPRATES: DESIGN AND CREATION OF 2 DIMENSIONAL HYBRID SYSTEMS WITH DISCRETE SUPERCONDUCTING-INSULATING AND SUPERCONDUCTING-MAGNETIC SUBSYSTEMS -- Abstract -- 1. Introduction -- 2. Brief Introduction of Theoretical Models for High-Tc Superconductivity -- 2.1. Interlayer Coulomb-Coupling Model -- 2.2. Anderson's Interlayer Interaction Model -- 2.3. The Spin Gap in Cuprate Superconductors -- 2.4. Spin Interactions in High-Tc Superconductors -- 2.5. One Dimensional (1-D) Stripe Model -- 3. Crystal and Electronic Structures of High-Tc Superconductors -- 3.1. Electronic Structure of Cuprate Superconductors -- 3.2. Electronic and Crystal Structures of Bi-Based High-Tc Cuprate Superconductors -- 4. High-Tc Superconductors in the 2 D Limit: [(Py-Cnh2n+1)2hgi4]-Bi2Sr2Cam-1cumoy (M=1 And 2) -- 4.1. Research Motivation -- 4.2. Synthesis and Measurements -- 4.2.1. Synthetic Strategy -- 4.2.2. Structure Analyses -- 4.2.3. D.C. Magnetic Susceptibility Measure -- 4.2.4. X-Ray Absorption Analysis (XAS) -- 4.2.5. Molecular-Orbital Calculations -- 4.3. Conclusion -- 5. A Novel Hybrid of High-Tc Superconducting and Curie-Paramagnetic Subsystems -- 5.1. Introduction -- 5.2. Synthesis -- 5.3. Physico-Chemical Properties -- 5.4. Conclusion.

6. Hybrid System of High-Tc Superconducting and Pauli-Type Paramagnetic Subsystems -- 6.1. Introduction -- 6.2. Synthesis -- 6.3. Physico-Chemical Properties -- 6.4. Conclusion -- Acknowledgements -- References -- Chapter3SURVEYINGTHEVORTEXMATTERPHASEDIAGRAMFORPRISTINEMGB2,ANDATOMICSUBSTITUTEDMG1−xALxB2ANDMGB2−xCxSINGLECRYSTALS -- Abstract -- 1.Introduction -- 2.ExperimentalTechniques -- 3.PristineSingleCrystals -- 3.1.GrowthofPristineMgB2SingleCrystals -- 3.2.ExperimentalDataforPristineMgB2SingleCrystals -- 3.2.1.VortexMatterPhaseDiagramforPristineMgB2SingleCrystals -- 3.2.2.ComparisonwiththeTheoreticalPredictions -- 3.2.3.PeakEffectandThermomagneticHistoryEffectsforPristineMgB2SingleCrystals -- 4.AluminiumSubstitutedSingleCrystals -- 4.1.GrowthofMg1−xAlxB2SingleCrystals -- 4.2.ExperimentalDataforMg1−xAlxB2SingleCrystals -- 4.2.1.VortexMatterPhaseDiagramforMg1−xAlxB2SingleCrystals -- 4.2.2.Two-BandSuperconductivityandPossibleImplicationsontheVortexMatterPhaseDiagram -- 5.CarbonSubstitutedSingleCrystals -- 5.1.GrowthofMgB2−xCxSingleCrystals -- 5.2.ExperimentalDataforMgB2−xCxSingleCrystals -- 5.2.1.PeakEffectandThermomagneticHistoryEffectsfortheMgB2−xCxSingleCrystals -- 5.2.2.VortexMatterPhaseDiagramforMgB2−xCxSingleCrystals -- 6.Conclusion -- Acknowledgments -- References -- Chapter 4 NANOCRYSTALLINE MICROSTRUCTURE OF MECHANICALLY ALLOYED MGB2 SUPERCONDUCTOR PRECURSOR POWDER FOR BULK AND TAPE FABRICATION AND IMPLICATIONS ON THE SUPERCONDUCTIVITY -- Abstract -- Introduction -- Experimental -- Results -- Mechanically Alloyed Powders -- Hot Pressed Bulk Samples -- Tapes -- Conclusion -- Acknowledgments -- References -- Chapter5THERMALTRANSIENTSINMGB2CONDUCTORS -- Abstract -- 1.CriticalCurrentforCoilsWithFerromagneticMatrix -- 2.QuenchAnalysisforAdiabaticCoils -- 3.MinimumQuenchEnergyandNormalZonePropagationVe-locities -- 4.Conclusion.

Acknowledgements -- References -- Chapter 6 THEORIES OF PEAK EFFECT AND ANOMALOUS HALL EFFECT IN SUPERCONDUCTING MGB2 -- Abstract -- 1. Introduction -- 2. Theory of Peak Effect for Type-II Superconductors -- 2.1. Mathematical Description of the Model -- 2.2. Critical Current Density And Peak Effect For Type-II Superconducting Films -- 2.3. Critical Current Density And Peak Effect For Superconducting Bulk Materials -- 3. Theory of Anomalous Hall Effect for Type-II Superconductors -- 3.1. Mathematical Model for Anomalous Hall Effect -- 3.2. Anomalous Hall Effect for Type-II Superconducting Bulk Materials -- 3.3. Anomalous Hall Effect for Type-II Superconducting Films -- 3.4. Reentry Phenomenon for Anomalous Hall Effect -- 4. Conclusion -- References -- Chapter 7 PINNING ENHANCEMENT IN MGB2 BY ADDITION OF SOME METALLIC ELEMENTS -- 1. Introduction -- 2. Pinning Properties of Ag/Mgb2 Bulk System -- 2.1. Sample Preparation -- 2.2. Experimental Results and Discussion -- 2.2.1. Electrical Resistivity -- 2.2.2. Magnetization Analysis -- 2.3. Summary -- 3. Pinning Property of Cu/Mgb2 System -- 3.1. Sample Preparation -- 3.2. Results and Discussion -- 3.2. Results and Discussion -- 4. Complete Flux Jump in Bulk Mgb2 Sintered under High Pressure -- 4.1. Sample Preparation -- 4.2. Experimental Results and Discussion -- 4.3. Summary -- 5. Doping Effects of Some Metallic Elements for Sic/Mgb2 Bulk System -- 5.1. Sample Preparation and Experimental -- 5.2. Results and Discussion -- 5.3. Summary -- 6. Effect of Zn on Pinning Properties in MgB2 Bulk System -- 6.1. Sample Preparation -- 6.2. Results and Discussion -- 6.3. Summary -- References -- Chapter 8 DOPING EFFECTS ON THE SUPERCONDUCTING PROPERTIES OF BULK AND PIT MGB2 -- Abstract -- Introduction -- Experimental -- Bulk Sample Preparation -- PIT Sample Preparation -- Sample Characterization.

Doping Effects on the Superconducting Properties of MgB2 bulk samples -- Single Walled Carbon Nanotube (SwCNT) -- Superconducting Transition and C-Content -- Critical Current Density -- Upper Critical Field -- Double Walled Carbon Nanotube (DwCNT) -- Superconducting Transition and C-Content -- Critical Current Density -- Upper Critical Field -- Nano-Sic and Carbon Nanotubes Distinctive Effects -- Critical Current Density -- Upper Critical Field -- Summary -- Effect of Sheath Materials -- Critical Current and Microstructure in MgB2 PIT Samples -- Thermal Stability -- Jc Performance at 26.5 K -- Summary -- Jc Anisotropy in MgB2 Tapes -- Influence of Rolling Degree in Jc at High Fields -- Influence of Rolling Degree in Texture -- Influence of Doping in Jc Anisotropy -- Summary -- Conclusion -- Acknowledgments -- References -- Chapter 9 OPTIMIZATION OF CRITICAL CURRENT DENSITY IN MGB2 -- Abstract -- 1. Background -- 2. Composition and Microstructure -- 2.1. Sample Preparation -- 2.1.1. Starting Powders -- 2.1.2. Reaction Conditions -- 2.2. Magnesium Non-Stoichiometry -- 2.3. Grain Connectivity -- 3. Influence of Boron Precursor Powders -- 4. Influence of Nominal Magnesium Non-stoichiometry -- 5. Chemical Modification: Second Phase Additions -- 6. Summary -- Acknowledgements -- References -- Chapter 10 MICROWAVE RESPONSE OF CERAMIC MGB2 SAMPLES -- Abstract -- 1. Introduction -- 2. Microwave Surface Impedance -- 2.1. Experimental Apparatus and Samples -- 2.2. Experimental Results -- 2.3. Discussion -- Results at T « Tc -- Results at Temperatures Close to Tc -- 3. Harmonic Emission -- 3.1. Experimental Apparatus and Samples -- 3.2. Experimental Results -- 3.3. Discussion -- Low-Temperature Behaviour -- Near-Tc Behaviour -- 4. Conclusion -- Acknowledgements -- References -- INDEX -- Blank Page.

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