Imprinted labyrinths and percolation in Nd-Co/Nb magnetic/superconducting hybrids

Magnetization reversal processes have been studied in hybrid magnetic/superconducting Nd-Co/Nb bilayers by the comparison of out-of-plane magnetic hysteresis loops and superconducting phase diagrams as a function of magnetic layer thickness and of disorder in the magnetic layer induced by a nanostructured copolymer template. A good correlation is found between the regimes corresponding to percolation effects in the superconductor and to the transition from extended to confined superconductivity with the characteristic fields for reverse domain nucleation and fast domain expansion in the magnetic layer, indicating that superconductivity nucleates on the disordered network imprinted on the superconducting layer by the labyrinth domain structure of the magnetic layer. As disorder increases in the magnetic layer, percolation effects disappear from the superconducting transitions in agreement with a more homogeneous magnetization reversal process

Spanish contribution to the development and application of probabilistic safety analysis: Experience and future challenges

[EN] The development of Probabilistic Safety Analysis, which began in Spain in 1986, is based on the document "Integrated Program on Development and Use of Probabilistic Safety Analysis in Spain" adopted by the Spanish regulatory body. A second edition of this document in 1998 considered the activities needed to apply its principles in different fields. Since then, the Spanish regulatory body, universities and the nuclear industry have contributed to their development and application, especially in nuclear power plants. This paper provides an overview of the Spanish experience in three areas: the regulatory framework, developments, and applications. We also provide information on opportunities for improvement and future challenges.Martorell Alsina, SS.; Marton Lluch, I.; Sánchez Galdón, AI.; Courtin, S.; Queral, C.; Meléndez, E.; Olivar, F.... (2024). Spanish contribution to the development and application of probabilistic safety analysis: Experience and future challenges. Nuclear Engineering and Design. 418. https://doi.org/10.1016/j.nucengdes.2023.11287941