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Imaging Current Flow Distributions in Polycrystalline Bi 2 Sr 2 CaCu 2 O x Superconductors by Magnetic Force Microscopy
Author(s) -
Král Filip,
Perednis Dainius,
Huey Bryan,
Bonnell Dawn A.,
Kostorz Gernot,
Gauckler Ludwig J.
Publication year - 1998
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/(sici)1521-4095(199812)10:17<1442::aid-adma1442>3.0.co;2-x
Subject(s) - materials science , superconductivity , current (fluid) , magnetic force microscope , microscopy , crystallite , condensed matter physics , grain boundary , magnetic field , microscope , composite material , microstructure , magnetization , optics , metallurgy , thermodynamics , physics , quantum mechanics
Imaging of current transport at low temperatures ; in a Bi‐based thick‐film superconductor is reported here. The approach is based on magnetic force microscopy (a scheme of the microscope is shown in the Figure) and is supplemented by finite element calculations of magnetic fields induced by current flow. The results (see cover) show that the current flows mainly in thin layers close to the grain boundaries of the superconductor.