Magnetic flux mapping, magnetization, and current distributions of YBa2Cu3O7 thin films by scanning Hall probe measurements

Abstract

Articles you may be interested inEffect of intragrain current on lowfield magneticflux distributions of zerofieldcooled polycrystalline YBa2Cu3O7−δ

Determination of two-dimensional current patterns in flat superconductors from magneto-optical measurements: An efficient inversion scheme

“…In his 1992 paper, 9 by a clever use of physical knowledge of the problem, Brandt finds an iteration procedure which yields g. Xing et al 10 either invert M explicitly or use an ad-hoc procedure 17 for solving Eq. ͑18͒.…”

“…This is a severe disadvantage, e.g., for samples with unknown defects. 8 A method which finds not only the currents, but also the current flow pattern is given by Brandt, 9 while a similar method was later given by Xing et al 10 Both methods work for infinitely thin samples only and the absolute calibration of the currents is difficult due to the fast change with distance of the magnetic field above such samples and the fact that in real measurements this distance is not known precisely. In the present paper this problem is solved by taking the thickness of the samples explicitly into account.…”

Temperature dependence of the magnetic-flux penetration into disk-shapedYBa2Cu3Darhmaoui1, Jung2, Talvacchio3 et al. 1996Phys. Rev. B10020View full textAdd to dashboardCite

“…The advantage of that is much more precise determination of the transition between the partial and complete penetration of magnetic flux. The results were compared with the predictions of the existing critical state models [3][4][5][6] and with the measurements of the flux and current distributions in a square-shaped thin film of YBCO by Xing et al 8 and Grant et al 9…”

In-plane field-effect correction in quantitative magnetooptical analysis

“…The inversion problem can be dealt with by di erent approaches (a direct approach is matrix inversion (Xing et al 1994, Wijngaarden et al 1996). We follow the arguments of Roth et al (1989); the Biot±Savart law has translational symmetry and thus we can apply the convolution theorem.…”