Magnetic Levitation Performance of Superconducting Silver-Added MgB2 Bulks Obtained by In Situ Spark Plasma Sintering

Güner S. B., Badica P., Miryala M.

Advanced Engineering Materials, cilt.27, sa.21, 2025 (SCI-Expanded, Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 27 Sayı: 21
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1002/adem.202501616
  • Dergi Adı: Advanced Engineering Materials
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
  • Anahtar Kelimeler: Ag addition, levitation force, MgB2 superconductor, spark plasma sintering
  • Ankara Üniversitesi Adresli: Hayır

Özet

Bulk MgB2 disks (20 mm in diameter and 3.8 mm in thickness) added with 0, 1.5, 3.0, 4.5, 6.0, and 9.0 wt% silver are obtained by in situ spark plasma sintering. Samples are characterized by structural, microstructural, magnetic, and magnetic levitation zero-field-cooling and field-cooling measurements. Superconducting transitions are sharp with critical temperatures being in the range of 36.5–37.9 K. The vertical (Fz,ZFC) and lateral (Fx) levitation force show maximum values for samples added with 1.5 or 3 wt Ag%. At 20 K they are +17.78 N and 6.37 N, respectively. A maximum for zero field critical current density and pinning force is found for the sample added with 3 wt%. Roughly, as expected, levitation force correlates with zero-field critical current density, but other details influence this dependance. Results indicate that silver is an effective addition to MgB2 for enhancement of levitation performance.