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- W4313251041 abstract "Thickness uniformity is regarded as an important parameter in designing thin film devices. However, some applications based on films with non-uniform thickness have recently emerged, such as gas sensors and optimized materials based on the gradual change of film composition. This work deals with superconducting Pb thin films with a thickness gradient prepared with the aid of a diffuse stencil mask. Atomic Force Microscopy and Energy-Dispersive X-ray Spectroscopy show variations ranging from 90~nm to 154~nm. Quantitative magneto-optical images reveal interesting features during both the abrupt and the smooth penetration regimes of magnetic flux, as well as the thickness-dependent critical current density ($J_c$). In addition, we observe a gradual superconducting transition as the upper critical field is progressively reached for certain thicknesses. Furthermore, the hysteresis observed for triggering flux avalanches when increasing and decreasing magnetic fields is also accounted for by the $J_c$ profile evolution along the thickness gradient. Numerical simulations based on the Thermomagnetic Model are in fair agreement with the experimental data. These findings demonstrate that wedge-shaped films are a viable approach to investigate, in a continuous fashion, thickness-dependent properties of a superconducting materials." @default.
- W4313251041 created "2023-01-06" @default.
- W4313251041 creator A5019632042 @default.
- W4313251041 creator A5045537605 @default.
- W4313251041 creator A5047335974 @default.
- W4313251041 creator A5057841878 @default.
- W4313251041 creator A5059629327 @default.
- W4313251041 creator A5060202188 @default.
- W4313251041 creator A5070502642 @default.
- W4313251041 creator A5079744280 @default.
- W4313251041 creator A5085601492 @default.
- W4313251041 creator A5086992349 @default.
- W4313251041 creator A5089278085 @default.
- W4313251041 creator A5074797900 @default.
- W4313251041 date "2022-12-27" @default.
- W4313251041 modified "2023-10-16" @default.
- W4313251041 title "Magnetic flux penetration in nanoscale wedge-shaped superconducting thin films" @default.
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