Title:
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Competition between superconductor : ferromagnetic stray magnetic fields in YBa2Cu3O7−x films pierced with Co nano-rods
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Author:
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Rouco Gómez, Víctor; Córdoba, R.; De Teresa, J. M.; Rodríguez, L. A.; Navau Ros, Carles; Valle Benedí, Nuria del; Via, G.; Sánchez Moreno, Álvaro; Monton, Carlos; Kronast, F.; Obradors, Xavier; Puig i Molina, Mª Teresa; Palau, Anna
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Abstract:
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Altres ajuts: Cost Actions MP1201 and CM1301 (CELINA). A. Sanchez acknowledges a grant from ICREA Academia, funded by the Generalitat de Catalunya. We are grateful to I. Rivas and R. Valero from LMA-INA (Zaragoza, Spain) for experimental help in the cobalt growth and Ar+milling processes, and Dr C. Magén and Dr. P. Algarabel from LMA-INA (Zaragoza, Spain) for facilitating the use of their high performance computing server to perform the micromagnetic simulations. We acknowledge R. Morales from UPV/EHU and Ikerbasque, A. Fernández-Pacheco from U. Cambridge and S. Valencia from Helmholtz-Zentrum, Berlin for fruitful discussions. |
Abstract:
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Superconductivity and ferromagnetism are two antagonistic phenomena that combined can lead to a rich phenomenology of interactions, resulting in novel physical properties and unique functionalities. Here we propose an original hybrid system formed by a high-temperature superconducting film, patterned with antidots, and with ferromagnetic nano-rods grown inside them. This particular structure exhibits the synergic influence of superconductor (SC) - ferromagnetic (FM) stray fields, in both the superconducting behaviour of the film and the three-dimensional (3D) magnetic structure of nano-rods. We show that FM stray fields directly influence the critical current density of the superconducting film. Additional functionalities appear due to the interaction of SC stray fields, associated to supercurrent loops, with the non-trivial 3D remanent magnetic structure of FM nano-rods. This work unravels the importance of addressing quantitatively the effect of stray magnetic fields from both, the superconductor and the ferromagnet in hybrid magnetic nano-devices based on high temperature superconductors. |
Subject(s):
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-Magnetic properties and materials -Superconducting properties and materials |
Rights:
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open access
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https://creativecommons.org/licenses/by/4.0/ |
Document type:
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Article |
Published by:
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Uri:
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https://ddd.uab.cat/record/181418
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