Magnetic instabilities in superconducting composites
نویسنده
چکیده
The stability of electric currents in multifilamentary superconducting composites against flux jumps is discussed in detail. The normal procedure for such a quantitative stability investigation is carried out. In some particular cases the stability criteria are found and analysed.
منابع مشابه
Current-voltage characteristics and superconducting state stability in composites
The influence of the electric field dependence of the differential conductivity on superconducting state stability in multifilamentary superconducting composites is studied theoretically. The obtained stability criterion allows one to determine the upper limit of the values of transport current and background electric field in the superconductor. To illustrate the theory, the superconducting st...
متن کاملThree-dimensional calculations of the magnetic fields in a finite superconducting hollow cylinder in an applied axial magnetic field
In this study, a set of self-consistent coupled-integral equations for the local magnetic flux and current distributions in a finite superconducting hollow cylinder under an axial magnetic field has been directly derived by using the Biot-Savart law within the framework of the critical-state model. The equations were first solved numerically in the three-dimensional space before obtaining the h...
متن کاملMagnetic and superconducting instabilities in the periodic Anderson model: an RPA study
We study the magnetic and superconducting instabilities of the periodic Anderson model with infinite Coulomb repulsion U in the random phase approximation. The Néel temperature and the superconducting critical temperature are obtained as functions of electronic density (chemical pressure) and hybridization V (pressure). It is found that close to the region where the system exhibits magnetic ord...
متن کاملFabrication of Chemically Doped, High Upper Critical Field Magnesium Diboride Superconducting Wires
Controlled chemical doping of magnesium diboride (MgB2) has been shown to substantially improve its superconducting properties to the levels required for high field magnets, but the doping is difficult to accomplish through the usual route of solid state reaction and diffusion. Further, superconducting cables of MgB2 are difficult to fabricate because of the friable nature of the material. In t...
متن کاملStability of Superconducting Wire in Magnetic Field
A fundamental experiment was carried out to study the motion of superconducting wire under the influence of electromagnetic force. Experiments were conducted at 4.2 K by varying the experimental conditions such as applied tension to test superconducting wire, insulating material used at the interface of superconducting wire and base material. The experimental method and the test results are rep...
متن کامل