Variation in the superconducting properties of Bi1.75Pb0.25Sr2Ca2Cu3O10+δ in proximity with Pr0.5Ca0.5MnO3

• Published in: Cryogenics (Guildford) 2022-09, Vol.126, p.103542, Article 103542
• Main Authors: Gayathri, V., Amaladass, E.P., Vinod, K., Sathyanarayana, A.T., Geetha Kumary, T., Mani, Awadhesh
• Format: Article
• Language: English
• Subjects: Bi-based superconductor; Heterostructure; Magnetic buffer layer; Proximity effect; Thin-film
• ISSN: 0011-2275; 1879-2235
• DOI: 10.1016/j.cryogenics.2022.103542

•Proximity effect of magnetic buffer layer on superconductivity of BSCCO thin film.•Enhanced magnetic exchange interaction due to uncompensated spins at interface.•Suppression of superconductivity due to magnetic exchange interaction of PCMO.•Decrease in anisotropy in heterostructure due to uncompensated spins at interface. Proximity-induced changes in the superconducting properties of Bi1.75Pb0.25Sr2Ca2Cu3O10+δ thin film grown on SrTiO3 substrate with Pr0.5Ca0.5MnO3 as buffer layer were studied using magnetotransport and magnetization measurements. A decrease in the value of the critical transition temperature and the upper critical field was observed, along with a reduction in the anisotropy of the Bi1.75Pb0.25Sr2Ca2Cu3O10+δ system in the presence of Pr0.5Ca0.5MnO3. This suppression of the superconducting properties in the presence of the insulating Pr0.5Ca0.5MnO3 layer can be explained based on the proximity effect induced enhancement in the vortex dissipation due to the internal magnetic exchange interaction present in the charge-ordered CE-type antiferromagnetic insulator, Pr0.5Ca0.5MnO3. The modification in the magnetic properties of the Pr0.5Ca0.5MnO3 layer due to the presence of interfacial strain was also observed. The proximity of the thin magnetic buffer layer of Pr0.5Ca0.5MnO3, though, has a detrimental impact on the superconductivity of Bi1.75Pb0.25Sr2Ca2Cu3O10+δ, has moulded the system into a more isotropic one.