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Sunday, August 9, 2020 | History

2 edition of Computer simulations of flux line motion in high temperature superconductors found in the catalog.

Computer simulations of flux line motion in high temperature superconductors

Matthew I.J Probert

Computer simulations of flux line motion in high temperature superconductors

by Matthew I.J Probert

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Published by University of Birmingham in Birmingham .
Written in English


Edition Notes

Thesis (Ph.D) - University of Birmingham, School of Physics and Space Research, Faculty of Science, 1995.

Statementby Matthew I.J. Probert.
ID Numbers
Open LibraryOL17204548M

The nonlinear response can persist up to T$\sb{\rm c}$(H) (determined by the onset of dc diamagnetism) at high frequency and high amplitude, suggesting that the concept of vortex lines is relevant and pinning effect is present in high temperature regime where linear resistivity is measurable and magnetic hysteresis vanished. We make progress towards a 3D finite-element model for the magnetization of a high temperature superconductor (HTS): We suggest a method that takes into account demagnetisation effects and flux creep, while it neglects the effects associated with currents that are not perpendicular to the local magnetic induction.

Magnetic flux penetrates the superconductor in the form of flux lines (vortices) that contain the smallest possible amount of magnetic flux, the magnetic flux quantum Φ o = h / 2 e = ⋅ 10 − 15 W b. The motion of these vortices automatically leads to a local modification of the electric field, phase, and magnetic flux.   Critical magnetic field is related with critical temperature as: H c (T) = H c (0)[1 – T 2 /T c 2] Meissner Effect: Suppose there is a conductor placed in a magnetic field at temperature T (refer figure). Then the temperature is decreased till the critical temperature. See what happened (figure). Lines of force are expelled from the.

The book covers the flux pinning mechanisms and properties and the electromagnetic phenomena caused by the flux pinning common for metallic, high-Tc and MgB 2 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 : Hardcover. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.


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Computer simulations of flux line motion in high temperature superconductors by Matthew I.J Probert Download PDF EPUB FB2

ELSEVIER Physica B () Computer simulations of flux motion in high-temperature superconductors M.I.J. Probert, A.I.M. Rae* School of Physics and Space Research, University of Birmingham, Edgbaston, Birmingham B I 5 2TT, UK Received 14 July Abstract The magnetic flux penetrating a superconductor is represented as a set of flux lines, interacting with each other Author: M.I.J.

Probert, A.I.M. Rae. The magnetic flux penetrating a superconductor is represented as a set of flux lines, interacting with each other through a realistic potential derived from Ginzburg-Landau theory and with a random pinning potential. The effects of temperature are simulated by a stochastic Langevin force.

The magnitude of critical current density Jc (or critical magnetic induction Bc), is closely related to the flux pinning property of the high-temperature superconductors (HTSC) materials. So, the Computer Simulation of Flux Pinning in the High-Temperature Superconductors Bi | SpringerLinkAuthor: L.

Liu, D. Lin, X. Wang. Simulation of High Temperature Superconductors and experimental validation Article (PDF Available) in Computer Physics Communications.

Elasticity of the flux-line lattice Elastic moduli and elastic matrix Nonlocal elasticity KL elasticity in anisotropic superconductors Line tension of an isolated flux line Examples and elastic pinning 5. Thermal fluctuations and melting of the flux-line lattice Thermal fluctuations of the flux-line positions Cited by: The motion of a flux line in a clean superconductor of extreme type II (λ≫ζ) at zero temperature is discussed in detail.

It is shown that the vortex core is subject to a Magnus force identical to that found in liquid helium. The Magnus force balances the friction force exerted by the lattice on the core. The 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. 3D problems are of high interest in HTS modelling [3, 5, 11, 39, 40], but far from being at the maturity level as one can nd in 2D, due to their high computational complexity and the poor (parallel) scalability of commercial software.

Indeed, for large-scale FE 3D simulations, the e cient exploitation of HPC resources becomes a must for providing a. Mechanism of flux-line motion in high-temperature superconductors: Authors: Wördenweber, R.

Affiliation: AA(Forschungszentrum Jülich, Institut für Schicht- und Ionentechnik, PostfachW Jülich, Germany) Publication: Physical Review B (Condensed Matter), Vol Issue 5, August 1,pp (PhRvB Homepage) Publication.

Superconductivity Research Laboratory Shinonome Koto-ku, TokyoJAPAN 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.

An alternative technique for investigating the microscopic behavior of flux in a hard superconductor is to use computer simulations (see, e.g., [17,18,19], and references therein).Here, we present simulations of the spatio-temporal evolution of rigid flux-gradient-driven flux lines in a twinned superconductor such as YBCO.

We first describe a model for vortex-vortex, vortex-pin, and vortex. The 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.

The book covers the flux pinning mechanisms and properties and the electromagnetic phenomena caused by the flux pinning common for metallic, high-Tc and MgB 2 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.

The histories of superconductivity and magnetism have been much intertwined. The discovery of the Meissner effect inwhere magnetic flux is expelled from a superconductor as it is cooled below its transition temperature T c, demonstrated that superconductors were more than just perfect conductors, leading to the famous proposal.

High temperature superconducting bulks or stacks of coated conductors (CCs) can be magnetized to become trapped field magnets (TFMs).

The magnetic fields of such TFMs can break the limitation of conventional magnets. The discovery of high-temperature superconductors in by Bednorz and Müller [, ] started an explosive growth worldwide of the research and development activities in the field of.

High temperature superconducting (HTS) bulks or stacks of coated conductors (CCs) can be magnetized to become trapped field magnets (TFMs). The magnetic fields of such TFMs can break the limitation of conventional magnets.

Almost any use of a superconductor implies a non-equilibrium state. Remarkably, while a sufficiently high-power electromagnetic field of GHz frequency can stimulate superconductivity, fast motion.

Numerical simulation of the magnetization of high-temperature superconductors 6 where Ec is the critical electric field and Jc is the critical current density.

The exponent n is related to the pinning strength and the temperature, T, of the material and. In models with thermally activated vortex motion over an energetic barrier U, n is given.

Numerical Simulations of Magnetic Properties of High-Temperature Superconductors (S Ryu & D Stroud) Quantum Melting and Quantum Creep of Vortex Matter in Thin Films of a-Nb3Ge (M H Theunissen et al.) Quantum Liquid of Vortices in Superconductors at T = 0 (G Blatter & B Ivlev) Vortex Lattice Structure in LuNi 2 B 2 C (Y De Wilde et al.).

Fundamental issues in high temperature superconductor (HTS) materials science and engineering. K. Marken, The problem can be analyzed by analytical methods (Ref. ) or by computer simulations of wall motion Flux-Line Lattice or Vortex Matter in Type II Superconductors.based high temperature superconductors discovered in the late s.

While these are type II lines also means stopping the motion of the magnet. Note that flux pinning can only occur in type-II capture the behaviour of the field with a line drawing. However, inside a type-II superconductor is one.springer, The 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.