Tek kristal süperiletkenlerde tuzaklanan manyetik alanın hesaplanması

Abstract

In this study, the trapped magnetic field is calculated numerically by varying thesample shape, dimensions and the distance between the sample surface and the observationpoint. The map of the trapped magnetic field is calculated using the sand-pile model andthe Biot-Savart law. It is observed that this calculation method is useful for thedetermination of the magnetic characteristics of the sample. The trapped magnetic field isfound to depend on the sample shape and dimensions and on the distance between thesample and the observation point. It is also observed that for the square sample the x- andy- components of trapped magnetic field are equal in magnitude, but opposite in direction.Another result is that the order of the samples in a cylindrical system affects themagnitude of the trapped magnetic field. In addition, it is found that a large single crystalcylindrical sample has a higher magnitude of the trapped magnetic field when compared toa system of samples with same size. It is also observed that in the system formed byidentical cylindrical samples the trapped magnetic field decreases with the increasingsample number.