Akademik Veri Yönetim Sistemi
Journal of Materials Science: Materials in Electronics, cilt.37, sa.7, 2026 (SCI-Expanded, Scopus)
In this study, the microstructural, electrical, and electromagnetic properties of MgB2 bulk superconductors modified with the organic additive of phenyl(3-phenyloxirane-2-yl)methane (C15H12O2) were investigated. Pure and bulk MgB2 samples doped with 0–20 wt% C15H12O2 were produced by in situ Spark Plasma Sintering (SPS) at 850 °C, 50 MPa pressure, and 10 min. X-ray diffraction analyses showed that the hexagonal MgB2 phase was predominantly preserved in all samples, with limited MgO formation observed at increasing addition rates. SEM analyses revealed that organic additive created controlled porosity and microstructural heterogeneity. Electrical measurements showed a limited decrease in the superconducting transition temperature and an increase in the normal-state resistivity in the doped samples. Magnetic characterization results revealed that the sample containing 15 wt% C15H12O2 exhibited the highest critical current density and optimized pinning force at 20 K. Levitation force measurements performed under ZFC and FC conditions have shown a strong correlation between microstructure-derived pinning architecture and electromagnetic response. The results reveal that C15H12O2 addition offers a suitable approach for effectively tuning the pinning and levitation properties of SPS-generated MgB2 bulk superconductors.