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Scanning transmission electron microscope (STEM) dark field micrograph of cross section (a) and planar view (b) for film. In the inset of (b) a planar view micrograph has been magnified in order to evaluate BZO particle dimension.
Pinning force density dependence on the normalized field evaluated for YBCO films with (squares), (diamonds), (circles), and (triangles) of BZO at 77 K.
Normalized pinning force density as a function of the normalized field recorded for film in the 85–65 K temperature range. The normalized field axis mapping has been set to log in order to better appreciate the change in curves shapes. The line of 65 K curve is thicker in order to outline the dual peaks structure.
Pinning force density as a function of the normalized field, , recorded for sample at 77 K and at different angles between the magnetic field direction and the -axis of the film: (circles), (squares), and (diamonds). In the inset the normalized pinning force density dependence on the normalized field recorded at and at , 77, and 82 K is shown. Black line represents the dependence recorded for YBCO at and 77 K.
Pinning force density as a function of the applied magnetic field collected at different temperature in the range 85–10 K for film. The shaded lines trace the temperature evolution of the two pinning contributions. and are the coefficient of the low field power law dependence evaluated at 10 K and 85 K, respectively.
Pinning force density as a function of the applied field recorded at 50, 30, and 10 K for YBCO (squares) and (circles) films. Data recorded at 10 K has been increased by a factor 1.5 for clarity.
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