[en] The magnetoresistance in an FeNi submicron-structure comprising two wires of 80 and 200 nm in width connected in series was measured at 77 K. When the external magnetic field was applied parallel to the wire axis, two switching fields corresponding to the distinct coercive force of the two wires were observed. When the external magnetic field was applied at an angle of θ>30 deg. to the wire axis one switching field was observed, indicating simultaneous magnetization reversal in both wires. This indicates that the domain-wall trapping around the joint can be controlled systematically in terms of the direction of the external magnetic field

[en] We deposited EuBa₂Cu₃O₇ (EBCO) films on vicinal R-Al₂O₃ substrates with CeO₂ buffer layers using DC magnetron sputtering. The influence of EBCO film thickness (t_EBCO) on surface morphology and superconducting properties of EBCO films was investigated in order to obtain high values of critical current density (J_c) and J_c x t_EBCO. By atomic force microscopy (AFM), the surface morphology of EBCO film was found to be porous and step-flow growth was observed. Micro-cracks began to occur above t_EBCO = 5000 A and increased as t_EBCO increased. The critical temperature (T_ce) was constant at 91 K regardless of t_EBCO. J_c and J_c x t_EBCO showed high values of 4.67 MA/cm² and 140.1 A/cm at 77.3 K, respectively, when the t_EBCO was 3000 A