| Yazarlar |
Gürcan Yıldırım
Abant İzzet Baysal Üniversitesi, Türkiye |
|
Musa Doğruer
Abant İzzet Baysal Üniversitesi, Türkiye |
Prof. Dr. Özgür ÖZTÜRK
Kastamonu Üniversitesi, Türkiye |
|
Ahmet Varilci
Abant İzzet Baysal Üniversitesi, Türkiye |
|
Cabir Terzioğlu
Abant İzzet Baysal Üniversitesi, Türkiye |
|
Yusuf Zalaoğlu
Osmaniye Korkut Ata Üniversitesi, Türkiye |
| Özet |
| This study aims to analyze the effect of Ce addition on the microstructural, superconducting and physical properties of Bi 1.8Sr 2.0CexCa 1.1Cu 2.1O y ceramics with x = 0, 0.001, 0.003, 0.005, 0.01, 0.03, 0.05 and 0.1 via X-Ray analysis (XRD), scanning electron microscopy (SEM), electron dispersive X-Ray (EDX) and magnetoresistivity measurements. The ceramics produced in this work are prepared using the standard solid-state reaction method. The zero resistivity transition temperatures (T c), activation energies (U0), irreversibility fields (μ 0Hi rr) and upper critical fields (μ 0H c2) are determined from the resistivity versus temperature (R-T) curves under dc magnetic fields up to 7 T The results show that T c and U0 values of the samples are found to decrease dramatically with the increase in the Ce-content and applied magnetic field. Moreover, XRD results indicate that all the samples contain the Bi-2212 phase only and exhibit the polycrystalline superconducting phase with less intensity of diffraction lines with the increase of the Ce addition. As for the results of SEM images, the texturing, crystallinity, grain size distribution, layered grain growth and grain connectivity are observed to degrade with the increase of the Ce doping. Besides, the irreversibility fields and upper critical fields are found to degrade as Ce doping increases. Penetration depths (λ) and coherence lengths (ξ) are also discussed. © 2012 Springer Science+Business Media, LLC. |
| Anahtar Kelimeler |
| Activation energy | Bi Sr CexCa Cu O 1.8 2.0 1.1 2.1 y | Irreversibility field | Magnetoresistivity | Upper critical field |
| Makale Türü | Özgün Makale |
| Makale Alt Türü | SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale |
| Dergi Adı | JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM |
| Dergi ISSN | 1557-1939 |
| Dergi Tarandığı Indeksler | SCI |
| Makale Dili | İngilizce |
| Basım Tarihi | 05-2012 |
| Cilt No | 25 |
| Sayı | 4 |
| Sayfalar | 893 / 903 |
| Doi Numarası | 10.1007/s10948-011-1384-1 |
| Makale Linki | http://link.springer.com/10.1007/s10948-011-1384-1 |
| Atıf Sayıları | |
| WoS | 22 |
| SCOPUS | 23 |
| Google Scholar | 24 |
