Magnetization of type-II superconductors in the form of short cylinders and the screening supercurrent distribution in the Bean model

Kuz’michev, N. D.; Fedchenko, A. A.

doi:10.1134/s1063784212050180

Cited by 3 publications

(1 citation statement)

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“…The numerical calculations performed in this work are based on the works [2,3], in which the magnetic properties of plates, disks, and short cylinders were determined within the Bin and Kim models using the integral equation of the second kind. For ellipsoids of rotation and cylinders, similar calculations are made in works [4,5]. It should be noted that there are other approaches currently used to describe the magnetic properties of finite-size superconductors, based on the stationary [6,7] and non-stationary [8] Ginzburg-Landau N.D. Kuzmichev, A.A. Shushpanov, M.A.…”

Section: Introductionmentioning

confidence: 93%

Simulation of the features of the magnetic properties of axisummetric granules of hard type II superconductors

2022

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Based on the equations of electrodynamics and the concept of a critical state for hard superconductors of the 2nd kind, numerical simulation of the magnetic properties of axisymmetric superconducting samples, in particular, granules, is performed for a number of models of the dependence of the critical current density on the magnetic field induction. The magnetic moment loops are calculated directly by integrating the integral equation for the current density over time. The phenomena of the peak effect and the asymmetry of the magnetization hysteresis loop are also considered using the indicated equation. Various versions of the functions used in the literature were used as peak functions. In addition to the hysteresis loop of the magnetic moment, the magnetic field induction at the center of axisymmetric samples, and the total penetration field, the profiles of the critical current density Jc(B) and the equilibrium magnetic moment for spherical granules were obtained. The method used for calculating the magnetic moment of superconductors makes it possible to take into account the equilibrium and nonequilibrium regions of the magnetization of the samples independently Keywords: magnetic moment, axisymmetric granules, type II superconductor, critical state, peak effect, equilibrium magnetic moment.

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