Hakan GUNDOGMUS, Sukru KARATAS, Aslı Asiye AGIL

BSCCO Süper İletkeninde (Mo / W) Eş-Katkılamanın Etkileri

Bu çalışmada, Mo ve W elementlerinin ortak katkılamasının (BiPb)2WxSr2Ca3Cu4-yMoyO12+& süper iletkeni üzerindeki x=0, y= 0; x = 0.1, y= 0.0, 0.03, 0.06, 0.09 ve 0.12 değerleri için etkileri araştırıldı. Üretilen malzemeler için iyi bilinen geleneksel katı hal tepkime metodu kullanıldı. Kalsinasyon ve sinterleme sıcaklıkları diferansiyel termal analiz tekniği (TGA) kullanılarak elde edildi. Kristal yapı özelliklerini araştırmak ve faz belirlenmesini belirlemek için X-ışını toz kırınım (XRD) ölçümleri yapıldı. XRD verileri, Cu'nin yerini alan Mo ile birlikte Bi- (2223) fazının Bi- (2212) fazına dönüştüğünü göstermiştir. Numunelerin morfolojik özellikleri taramalı elektron mikroskobu (SEM) ölçümleri ile belirlenmiştir. BSCCO sisteminde ikame edilen Mo ve W'nin etkileri; kritik sıcaklıkları elde etmek için elektrik direnç (R-T) ölçümleri gerçekleştirdik. Elektrik direncinden kritik sıcaklık ve geçiş sıcaklığı genişliği hem Mo içeriğinin artmasıyla artmıştır. Alternatif akım duyarlılık ölçümü (AC), kritik geçiş sıcaklığı elde etmek ve numunelerin manyetik özelliklerini incelemek için gerçekleştirildi

Effects of (Mo/W) Co-Doping on Bulk BSCCO Superconductor

The effect of Mo substituting and W doping on (BiPb)2WxSr2Ca3Cu4-yMoyO12+& system where x=0,y= 0; x = 0.1, y= 0.0, 0.03, 0.06, 0.09 and 0.12 have been investigated. The superconducting samples preparedby using conventional solid state reaction method. The calcination and sintering temperatures were obtainedby using differential thermal analysis technique (TGA). In order to investigate crystal structure properties anddetermine the phase determination, X-ray powder diffraction (XRD) measurements were performed. TheXRD data showed that the Bi-(2223) phase transforms into the Bi-(2212) phase with increasing Mosubstituting for Cu. The morphology properties of the samples determined with the scanning electronmicroscopy (SEM) measurements. The effects of Mo and W substituted on BSCCO system; we have alsoperformed electrical resistivity (R-T) in order to get critical temperatures. From electrical resistivity criticaltemperature and transition temperature width were both increased with the increasing of Mo content. Thealternative current susceptibility measurement (AC) was performed to obtain critical transition temperatureand study magnetic properties of the samples.

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