Vortex pinning vs superconducting wire network: origin of periodic oscillations induced by applied magnetic fields in superconducting films with arrays of nanomagnets
| Autor: | S. J. Carreira, Elvira M. Gonzalez, J. del Valle, José L. Prieto, C. E. Chiliotte, Alicia Gomez, J. L. Vicent, Ivan K. Schuller, Victoria Bekeris |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Ciencias Físicas FOS: Physical sciences 02 engineering and technology engineering.material 01 natural sciences Superconductivity (cond-mat.supr-con) Magnetization Electrical resistivity and conductivity vortex pinning Condensed Matter::Superconductivity 0103 physical sciences Materials Chemistry Electrical and Electronic Engineering 010306 general physics Superconductivity Telecomunicaciones Condensed matter physics Física de materiales Condensed Matter - Superconductivity Superconducting wire Metals and Alloys 021001 nanoscience & nanotechnology Condensed Matter Physics Nanomagnet Coherence length Magnetic field Vortex Astronomía Física del estado sólido Ceramics and Composites engineering Electrónica Little–Parks effect 0210 nano-technology CIENCIAS NATURALES Y EXACTAS nanoestructures |
| Zdroj: | Superconductor Science and Technology, ISSN 0953-2048, 2014-06, Vol. 27, No. 6 Archivo Digital UPM Universidad Politécnica de Madrid E-Prints Complutense. Archivo Institucional de la UCM instname Repositorio Institucional del Instituto Madrileño de Estudios Avanzados en Nanociencia E-Prints Complutense: Archivo Institucional de la UCM Universidad Complutense de Madrid |
| Popis: | Hybrid magnetic arrays embedded in superconducting films are ideal systems to study the competition between different physical (such as the coherence length) and structural length scales such as are available in artificially produced structures. This interplay leads to oscillation in many magnetically dependent superconducting properties such as the critical currents, resistivity and magnetization. These effects are generally analyzed using two distinct models based on vortex pinning or wire network. In this work, we show that for magnetic dot arrays, as opposed to antidot (i.e. holes) arrays, vortex pinning is the main mechanism for field induced oscillations in resistance R(H), critical current Ic(H), magnetization M(H) and ac-susceptibility χ ac(H) in a broad temperature range. Due to the coherence length divergence at Tc, a crossover to wire network behaviour is experimentally found. While pinning occurs in a wide temperature range up to Tc, wire network behaviour is only present in a very narrow temperature window close to Tc. In this temperature interval, contributions from both mechanisms are operational but can be experimentally distinguished. Fil: Gomez, A. Universidad Complutense de Madrid; España Fil: del Valle, J. Universidad Complutense de Madrid; España Fil: Gonzalez, E. M.. Universidad Complutense de Madrid; España. IMDEA. Madrid; España Fil: Chiliotte, Claudio Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina Fil: Carreira, Santiago José. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina Fil: Bekeris, Victoria Isabel. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina Fil: Prieto, J. L.. Universidad Politécnica de Madrid; España Fil: Schuller, Ivan K.. University of California at San Diego; Estados Unidos Fil: Vicent, J. L.. IMDEA. Madrid; España. Universidad Complutense de Madrid; España |
| Databáze: | OpenAIRE |
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