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Tuesday, May 19, 2020 | History

2 edition of Critical Current, Flux Pinning and Optical Studies of High Temperature Superconductors found in the catalog.

Critical Current, Flux Pinning and Optical Studies of High Temperature Superconductors

Anant Narlikar

Critical Current, Flux Pinning and Optical Studies of High Temperature Superconductors

by Anant Narlikar

  • 195 Want to read
  • 1 Currently reading

Published by Nova Science Publishers .
Written in English

    Subjects:
  • Semi-conductors & super-conductors,
  • Science,
  • Technology & Industrial Arts,
  • Science/Mathematics,
  • Superconductors & Superconductivity,
  • PHYSICS

  • The Physical Object
    FormatHardcover
    Number of Pages294
    ID Numbers
    Open LibraryOL12120053M
    ISBN 10156072420X
    ISBN 109781560724209

      The dependence on temperature of the critical current has been widely explained by I c (t)/I c (0) = (1−t 2) α (1 + t 2) β for type-II superconductors, such as high-T c cuprates, Fe-based. Abstract. One of the properties of the crystal structure of oxide superconductors with high critical temperature is an alternating multi-layer of CuO 2 planes which generate superconductivity and charge-reservoir blocks which are almost insulating. This structure causes a large anisotropy in normal conducting and superconducting properties.

    A probe has been designed and built to measure the critical current density (J C)of short superconducting wires and tapes as a function of strain (e) in small bore high field magnets. The probe can measure currents of up to Amps and strains of ± % on both low and high temperature superconductors. Measurements can be made. The book discusses all the aspects related to all families of cuprate superconductors discovered so far. Beginning with the phenomenon of superconductivity, the book covers: the structure of cuprate HTSCs, critical currents, flux pinning, synthesis of HTSCs, proximity effect and SQUIDs, possible applications of high Tc superconductors and.

    @article{osti_, title = {THEORY OF FLUX CREEP IN HARD SUPERCONDUCTORS}, author = {Anderson, P.W.}, abstractNote = {Previous investigations of the critical state of the hard superconductor have defined it in terms of constants alpha and B/sub O/; alpha (T) = J/sub cr/ (B/sub cr/ + B/sub 0/). If the current density J or the field B is increased beyond the critical values, a process called. Description: The book deals with the flux pinning mechanisms and properties and the electromagnetic phenomena caused by the flux pinning common for metallic, high-temperature and MgB2 superconductors. The loss originates from the ohmic dissipation of normal electrons in the normal core driven by the electric field induced by the flux motion.


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Critical Current, Flux Pinning and Optical Studies of High Temperature Superconductors by Anant Narlikar Download PDF EPUB FB2

Critical Current, Flux Pinning and Optical Studies of High Temperature Superconductors [Anant Narlikar] on *FREE* shipping on qualifying offers. Narlikar Critical Current, Flux Pinning and Optical Studies of High Temperature Superconductors: Anant Narlikar: : Books.

Critical current, flux pinning and optical studies of high temperature superconductors. However, formatting rules can vary widely between applications and fields of interest or study. The specific requirements or preferences of your reviewing publisher, classroom teacher, institution or organization should be applied.

flux pinning and. A model of thermally activated vortex motion is developed which explains the dependence of the noise on frequency, temperature, magnetic field, and current. The pinning potential is idealized as an ensemble of symmetrical double wells, each with a different activation energy separating the two states.

Main headings: Flux Depinning and Current vs. Voltage Characteristics Near the Glass-Liquid Transition; Equilibrium Properties of the Mixed Phase of High-Tc Superconductors in the Presence of Pinning; Microstructure and Flux Pinning in Melt Processed (Nd,Eu,Gd)-Ba-Cu-O Superconductor; Influence of Irradiation-Induced Defects and Chemical Substitutions on the Flux Pinning.

The next chapter concentrates on flux pinning effect which result in high critical current densities even at high temperatures and in high magnetic fields. The magnetoresistance and Hall effect in both normal and superconducting states of the cuprate superconductors are reviewed in chapter 3.

This volume will focus on the theory and experiments leading to quantitative understanding of the magnetic field and temperature dependence of critical current densities in high-temperature superconductors. Topics will include: critical currents and flux-pinning, flux flow and flux creep, anisotropy of critical fields and currents, properties.

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 Table of Contents for the full book PDF is as follows: * Organizing Committee * Foreword * Invited Lectures * Critical currents in neutron irradiated high temperature superconductors * Radiation induced disorder as a unique method for studying electronic states of HTSC's and modifying their properties * Influence of fast neutron irradiation on various types of HTSC materials: comprehensive.

The characteristics of critical current density of cuprate high temperature superconductors were successfully explained by the flux creep-flow model [3]. The temperature and magnetic field.

The critical current of superconductors: an historical review D. Dew-Hughes* Oxford University, Department of Engineering Science, Parks Road, Oxford OX1 3PJ, UK ~Submitted May 4. Fiz. Nizk. Temp. 27, – ~September–October. The most important practical characteristic of a superconductor is its critical current density.

This. The development of superconducting tapes with high critical current density (Jc) is crucial for their use in transmission cables. In order to study the flux pinning mechanism of these defects. which depresses both critical current density and critical field, thereby limiting the technological applications of High Temperature Superconductors.

However, there is a way to enhance the critical current density in HTSC by somehow arresting the movement of these fluxons.

This is called Flux Pinning and can be achieved by introducing. High-Temperature Superconductivity: History and Outlook Fig. 1 Low-temperature Resistivity of a Ba-doped LaCuO 3 Sample with x (Ba)=, Recorded for Different Current Densities Fig.

2 Temperature Dependence of the Magnetic Susceptibility in Ba-doped La 2CuO 4 A/cm2 0 A/cm2 A/cm2 0 T(K) ρ.

Gernot H. Gessinger, in Materials and Innovative Product Development, Introduction. High-temperature superconductors (HTSCs), when discovered in [2], presented a huge challenge but also opportunity to companies like ABB, GE, and Siemens to radically improve their case study traces the development of large-scale applications, such as superconducting fault current.

The most important practical characteristic of a superconductor is its critical current density. This article traces the history of the experimental discoveries and of the development of the theoretical ideas that have lead to the understanding of those factors that control critical current densities.

These include Silsbee’s hypothesis, the Meissner effect, the London, Ginsburg–Landau, and. This book has grown largely out of research works on melt processing of high-temperature superconductors conducted at ISTEC Superconductivity Research Laboratory. The chapters build on melt processing, microstructural characterization, fundamentals of flux pinning, critical current, and applications of bulk monolithic superconductors.

1 The critical current density in type-II superconducting bulk materials Ming Ju Chou 1 and Wei Yeu Chen 2, ∗ 1 Department of Physics, National Taiwan Normal University, TaipeiTaiwan, R.O.C. 2 Department of Physics, Tamkang University, TamsuiTaiwan, R.O.C.

(March 1, ) Abstract The critical current density Jc in type-II conventional and high-Tc superconducting bulk. Superconductors is neither about basic aspects of superconductivity nor about its applications, but its mainstay is superconducting materials.

Unusual and unconventional features of a large variety of novel superconductors are presented and their technological potential as practical superconductors assessed. The book begins with an introduction to basic aspects of superconductivity.

Vortex dynamics in high-temperature superconductors (HTSC's) with linear defects (LD's) was found to be a fascinating field of introduction of LD's by high-energy heavy-ion irradiation allows one not only to increase the loss-free current, but also to probe properties of the flux-line ent models for depinning of vortices from LD's are proposed in the literature.

Abstract Quantitative magneto-optical imaging of magnetic flux distributions has developed in a powerful tool for the analysis of the local transport properties of superconductors. It allows a model-independent determination of the current density distribution of thin films and, thus, the local current density through individual defects.

Also, local metastable properties are detectable, such. Studies of High Temperature Superconductors by A. V. Narlikar,available at Book Depository with free delivery worldwide.Critical Current, Flux Pinning and: Optical Studies of High Temperature Superconductors liked it avg rating — 1 rating — published Want to Read saving /5(1).The flux pinning properties in high temperature superconductors are strongly influenced by ther-mally activated flux motion.

The scaling relation of the pinning force density and the irreversibility line in various high temperature superconductors are numerically analyzed in terms of the flux creep model.