Effects of MgO on the Electronic and Superconducting Properties in Succinic Acid (C4H6O4) Doped MgB2 Bulks
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, cilt.26, sa.5, ss.1525-1529, 2013 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 26 Sayı: 5
- Basım Tarihi: 2013
- Doi Numarası: 10.1007/s10948-012-1952-z
- Dergi Adı: JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.1525-1529
- Anahtar Kelimeler: MgB2 bulks, Succinic acid, Upper and irreversibility field, CRITICAL-CURRENT DENSITY, ENHANCEMENT, CARBON
- Ankara Üniversitesi Adresli: Evet
Özet
In this paper, we report the doping effects of succinic acid, C4H6O4 (from 0 to 30 wt%) on the lattice parameter, critical temperature (T-c), critical current density (J(c)), upper critical field (H-c2), and irreversibility field (H-irr) in MgB2 superconductor. It was found that MgB2 doped with 10 wt% C4H6O4 and sintered at 900 degrees C exhibited excellent J(c) above 10(4) A cm(-2) at 5 K and 8 T. Impurity scattering due to C substitution, improved crystallinity and the least amount of MgO in 10 wt% doped sample improves J(c) very significantly. The MgO amount is rapidly increased in 20 and 30 wt% doped samples which causes a strong depression of J(c), H-c2, H-irr due to poor inter and intra-grain connectivity.