The Effect of Ar Ambient Pressure and Annealing Duration on the Microstructure, Superconducting Properties and Activation Energies of MgB2 Superconductors
Yazarlar (5)
Prof. Dr. Özgür ÖZTÜRK Kastamonu Üniversitesi, Türkiye
Doç. Dr. Elif AŞIKUZUN TOKEŞER Kastamonu Üniversitesi, Türkiye
Öğr. Gör. Dr. Şeydanur KAYA Kastamonu Üniversitesi, Türkiye
N. S. Koc
Bolu Abant İzzet Baysal Üniversitesi, Türkiye
Bolu Abant İzzet Baysal Üniversitesi, Türkiye
M. Erdem
Bolu Abant İzzet Baysal Üniversitesi, Türkiye
Bolu Abant İzzet Baysal Üniversitesi, Türkiye
| Makale Türü | Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale) | ||
| Dergi Adı | Journal of Superconductivity and Novel Magnetism | ||
| Dergi ISSN | 1557-1939 Wos Dergi Scopus Dergi | ||
| Dergi Tarandığı Indeksler | SCI | ||
| Makale Dili | İngilizce | Basım Tarihi | 05-2017 |
| Cilt / Sayı / Sayfa | 30 / 5 / 1161–1169 | DOI | 10.1007/s10948-016-3877-4 |
| Makale Linki | http://link.springer.com/10.1007/s10948-016-3877-4 | ||
| Özet |
| MgB2 samples are produced by ex situ reaction method under vacuum, and various (0, 10, 20 Bar) Ar pressure for 0.5 and 1 h. The effect of ambient pressure and annealing duration on the microstructure and electrical properties of bulk samples are investigated. XRD, SEM, and magnetoresistance measurements are made. The a and c lattice parameters and the grain size values are the highest for the samples produced under vacuum and their values decrease with increasing Ar pressure. Moreover, these values increase when the annealing duration increases from 0.5 to 1 h. The increasing pressure reduces the bond lengths between the atoms thus the grain sizes decrease. Smaller grain size promotes the connection between grains which results in an increase of the critical current density (Jc). SEM micrographs reveal that the produced samples have granular structure which is a characteristic feature of MgB2 … |
| Anahtar Kelimeler |
| Activation energy | Magnetoresistivity | MgB2 | Superconductivity |
BM Sürdürülebilir Kalkınma Amaçları
| Atıf Sayıları | |
| Web of Science | 5 |
| Scopus | 5 |
| Google Scholar | 5 |