Journal ArticleDOI
Flux expulsion and trapping in rotating discs of type II superconductors
R. Boyer,M.A.R. LeBlanc +1 more
TLDR
In this paper, the magnetic flux rotating in step with a type II superconducting disc is measured with orthogonal pick up coils for various previous magnetic histories vs H 0 applied ⊥ to the axis of rotation.About:
This article is published in Solid State Communications.The article was published on 1977-10-01. It has received 29 citations till now. The article focuses on the topics: Magnetic flux & Flux pinning.read more
Citations
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Journal ArticleDOI
Hysteresis losses and magnetic phenomena in rotating disks of type‐II superconductors
TL;DR: In this paper, the authors investigated the behavior of the magnetic flux threading superconducting disks of Nb oscillating slowly over various angular displacements in static magnetic fields H0 directed perpendicular to the axis of rotation.
Journal ArticleDOI
Magnetic response of type‐II superconductors subjected to large‐amplitude parallel magnetic fields varying in both magnitude and direction
TL;DR: In this article, the authors developed a numerical method for finding the magnetic response of type-II superconductors subjected to parallel magnetic fields that change in both magnitude and orientation, and compared their results with related experiments by Cave and LeBlanc, and reported model calculations for the ac behavior when the sample is subjected to a dc bias field and a large-amplitude ac field at various angles (0°, 45°, and 90°) relative to this field.
Journal ArticleDOI
Finite difference modelling of bulk high temperature superconducting cylindrical hysteresis machines
TL;DR: In this article, a mathematical model of the critical state based on averaged fluxon motion has been implemented to solve for the current and field distributions inside a high temperature superconducting hysteresis machine.
Journal ArticleDOI
Study of longitudinal current problem in the low-field electrodynamics of HTS ceramics
TL;DR: In this paper, a detailed measurement of the electric field vector in high-superconducting (HTS) ceramics, as functions of the transport current along the z-axis and of the angle between a constant external magnetic field applied in the sample plane and the current direction, was performed.
Journal ArticleDOI
Critical states in thin planar type-II superconductors in a perpendicular or inclined magnetic field (Review)
TL;DR: In this article, the critical states of a vortex lattice in type-II superconductors are examined without any assumptions about the relative perpendicularity of the local magnetic fields and circulating currents in the sample.
References
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Journal ArticleDOI
Surface Barrier in Type-II Superconductors
C. P. Bean,J. D. Livingston +1 more
TL;DR: In this article, the interaction between a flux thread and the specimen surfuce of a semi-infinite type-II superconductor with a thread within it lying parallel to the single plane surface is considered to determine any low-field hysteresis in the magnetization curves of well-annealed, single-phase specimens.
Journal ArticleDOI
Magnetization and Critical Supercurrents
TL;DR: In this paper, a critical current density relation alpha /J = B/sub 0/ + B is deduced for Nb/sub 3/Sn and 3Nb-Zr.
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Spiral-vortex expansion instability in type-II superconductors
TL;DR: In this article, it was shown that a flux vortex, in the presence of a sufficiently large current density applied parallel to its axis, is unstable against the growth of helical perturbations.
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Rotational Hysteresis Loss in High‐Field Superconductors
TL;DR: In this paper, the rotational hysteresis loss in hard type II superconductors is calculated using the critical state model and it is shown that for materials that can be characterized by a magnetic field-independent critical current density Jc the surface rotational loss is W(rot)s=[5/4π(6)]1/2(H03/Jc) erg/cm2−cycle.
Journal ArticleDOI
Axial torque in trained superconducting wires in a transverse magnetic field
TL;DR: In this paper, a torsion-balance method is used to measure the relaxation of magnetic moment in magnetized superconductors for the purpose of calculating the magnetic-flux-pinning energies and total trapped magnetic flux in the superconductor.