(Color online) SEM image of the experimental arrangement of a Nb stripline ( wide) with an array of Ni dots (see the dark area on the strip line and the enlarged inset) for the resistive measurement of the longitudinal voltage and the two pairs of Hall contacts for simultaneous determination of the Hall signal at the dot array (at the top) and at a reference point without magnetic dots (bottom pair of Hall contacts). The periodicity of the array is and ; the smaller lattice parameter forms an angle with the direction of the Lorentz force (see inset).
(Color online) Temperature dependence of the longitudinal specific resistance (solid line) and inverted Hall signals with (open squares) and without (open triangles) array of magnetic dots. It should be noted that is negative for .
(Color online) Set of VICs for different temperatures for the Hall measurement on the array of magnetic dots. The dashed lines in (a) represent the linear contribution that is plotted as function of temperature in the inset together with the temperature dependence of longitudinal resistance . In (b) the nonlinear contribution is plotted for the VICs recorded in the superconducting state. Different current densities that characterize specific features of the VICs are marked for one of the VICs.
(Color online) Ratio of the Hall signal at the magnetic dots and the longitudinal voltage as function of temperature for various applied magnetic fields . The inset shows the field dependence of the ratio at
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