An Experimental Study of Flux Pinning in High Temperature Superconductors PDF Download

Author: Dong-Ning Zheng
Publisher:
ISBN:
Category :
Languages : en
Pages :

View

Book Description

Author: Teruo Matsushita
Publisher: Springer Nature
ISBN: 3030946398
Category : Technology & Engineering
Languages : en
Pages : 506

View

Book Description
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.

Author: A. V. Narlikar
Publisher: Nova Publishers
ISBN: 9781594549601
Category : Science
Languages : en
Pages : 348

View

Book Description
This Golden Jubilee volume in the world's foremost series on superconductivity covers wide-ranging topics capturing the current excitement in the field. The broad areas include the advancement of high Tc theory, materials depicting unusual characteristics, materials' processing and defect structures for improved properties, their electromagnetic response, flux pinning, Josephson junctions and devices, and large scale applications.

Author: A. V. Narlikar
Publisher: Nova Publishers
ISBN:
Category : Flux pinning
Languages : en
Pages : 296

View

Book Description
Studies of High Temperature Superconductors, Volume 48 - Vortex Physics & Flux Pinning

Author: A. V. Narlikar
Publisher: Nova Publishers
ISBN: 9781560721321
Category : Technology & Engineering
Languages : en
Pages : 476

View

Book Description
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: A. V. Narlikar
Publisher: Nova Publishers
ISBN: 9781594543043
Category : Flux pinning
Languages : en
Pages : 296

View

Book Description
Studies of High Temperature Superconductors, Volume 48 - Vortex Physics & Flux Pinning

Author: Adir Luiz
Publisher: BoD – Books on Demand
ISBN: 953307308X
Category : Science
Languages : en
Pages : 276

View

Book Description
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.

Author: R. Kossowsky
Publisher: Springer Science & Business Media
ISBN: 9780792356639
Category : Science
Languages : en
Pages : 796

View

Book Description
Proceedings of the NATO Advanced Study Institute, Kusadasi, Turkey, July 26-August 8, 1998

Author: Donglu Shi
Publisher: Elsevier
ISBN: 0080534171
Category : Technology & Engineering
Languages : en
Pages : 498

View

Book Description
This book explores the fascinating field of high-temperature superconductivity. Basic concepts–including experimental techniques and theoretical issues–are discussed in a clear, systematic manner. In addition, the most recent research results in the measurements, materials synthesis and processing, and characterization of physical properties of high-temperature superconductors are presented. Researchers and students alike can use this book as a comprehensive introduction not only to superconductivity but also to materials-related research in electromagnetic ceramics. Special features of the book: - presents recent developments in vortex-state properties, defects characterization, and phase equilibrium - introduces basic concepts for experimental techniques at low temperatures and high magnetic fields - provides a valuable reference for materials-related research - discusses potential industrial applications of high-temperature superconductivity - includes novel processing technologies for thin film and bulk materials - suggests areas of research and specific problems whose solution can make high-Tc superconductors a practical reality

Author: Koji Kajimura
Publisher: Springer Science & Business Media
ISBN: 4431681418
Category : Technology & Engineering
Languages : en
Pages : 1312

View

Book Description
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.