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Magnetic and levitation properties of YBCO/polymer composite drop-casting films
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Resumo(s)
Superconducting materials have been extensively studied for various applications, with YBCO alloys among the most researched and widely applied. This paper investigates the feasibility of using YBCO powder-based inks to produce cost-effective films with magnetic properties. Our studies demonstrate that levitation in liquid nitrogen is consistently observed in all fabricated films, regardless of ink composition or application method. Both drop-casting and spray-coating techniques were successfully employed to create levitating films. Additionally, various substrates—including aluminum foil (with and without adhesive), plastic foil, Teflon, and paper—were evaluated, with no significant impact on levitation performance. The levitation height was also compared to samples without a substrate. Depending on the binder, the resulting films exhibit rigidity or flexibility while maintaining their levitation capabilities even after multiple bending cycles. However, film conductivity is influenced by the binder type and concentration, which also affects the critical current density. A film with a thickness of 300 μm demonstrated a Jc of 2 kA/cm² at 65 K and zero magnetic field.
Descrição
This work was also supported by ERC-CoG-2014 , CapTherPV , 647596 .
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© 2025 The Authors
Palavras-chave
Levitation and magnetic properties Polymers superconductor hybrid materials Selfsustained drop-casting films Surface and chemical analysis YBCO superconductor powders Engineering (miscellaneous) General Materials Science