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Spatial Characteristics of Superconductors and a 3D Hall Microscope for Their Analysis

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Abstract

Based on Hall probes, a scanning microscope with a survey area of 5 × 5 mm has been developed and used for high-spatial-resolution and sensitivity measurements of the topology of magnetic field B(X, Y, Z) on the surface of and around the YBa2Cu3O7 – x and Bi2Sr2CaCu2O8 + x samples without resorting to electrodynamics expressions. The differential technique with the fixation of the beginning and end of the probe displacement ensures the scanning accuracy of about 10 and 1 μm for scanning along the X, Y, and Z axes, respectively. The maximal displacement along the Z axis is 25 mm. For eliminating measuring errors, normalized distributions B(Z)/Bmax(0) are extrapolated to the ordinate axis shifted along the Z axis by the width of the gap between the sample surface and the Hall probe.

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Authors and Affiliations

  1. Fryazino Branch, Kotelnikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, 141190, Fryazino, Moscow oblast, Russia

    Kh. R. Rostami

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  1. Kh. R. Rostami
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Correspondence to Kh. R. Rostami.

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Translated by N. Wadhwa

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Rostami, K.R. Spatial Characteristics of Superconductors and a 3D Hall Microscope for Their Analysis. Tech. Phys. 65, 1975–1980 (2020). https://doi.org/10.1134/S1063784220120233

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