Year 2021, Volume 10 , Issue 2, Pages 393 - 402 2021-06-07

Determination of Possible Maximum Critical Transition Temperatures with Empirical Model Depending on Structural Disorders-Defects for Bi2.1Sr2.0Ca1.1Cu2.0Oy System
Determination of Possible Maximum Critical Transition Temperatures with Empirical Model Depending on Structural Disorders-Defects for Bi2.1Sr2.0Ca1.1Cu2.0Oy System

Ümit ERDEM [1] , Gürcan YILDIRIM [2]


Bu çalışmada, katı Bi-2212 süperiletken sisteminin yapısal bozukluklar-kusurlar ve kritik geçiş sıcaklıkları (başlangıç, Tc başlangıç ve ofset, Tc ofset) arasındaki ilişki hazırlık tavlama ortam koşullarına bağlı olarak ilk kez güçlü bir ilişki kurduk. Süperiletken malzemeler, geleneksel katı hal reaksiyon yolu ile 24 saat ila 48 saat arasında değişen tavlama süresi için 10°C sıcaklık adımı ile 830 °C - 850 °C arasındaki farklı tavlama sıcaklık aralıklarında hazırlandı. Sıcaklığa bağlı direnç ölçümleri 30-140 K sıcaklık aralığında yapıldı. Tüm deneysel ve teorik bulgular, tavlama ortamının temel karakteristik özellikleri önemli bir şekilde etkilediğini göstermektedir. En iyi tavlama ortamı, aktif elektron-fonon bağlantı özelliklerinin oluşum olasılığındaki artış ve gezici yük taşıyıcı konsantrasyonlarının optimizasyonu nedeniyle 840 °C 'lik tavlama sıcaklığının ve 24 saatlik sürenin kombinasyonu olduğu bulunmuştur. Benzer şekilde, Cu-3d ve O-2p elektronları arasındaki dalga fonksiyonlarının örtüşme mekanizmasında ve özellikle elektronik durum yoğunluklarının logaritmik dağılımında pozitif katkılar gözlendi. Ayrıca, uygun koşullardaki tavlama ortamı, Bi-2212 sisteminin kristal yapı kalitesini ve kristal yapıdaki taneler arasındaki etkileşimin iyileştirilmesini sağlamaktadır. Tersine, aşırı tavlama ortamı, kristal sistemdeki kalıcı kristal yapı problemlerinin önemli ölçüde artmasına neden olur. Ayrıca, en yüksek ilişkili model, kısa menzilli antiferromanyetik Cu-O2 katmanlarındaki minimum yapısal bozukluklara sahip Bi-2212 süper iletken malzemelerinin, maksimum Tc başlangıç ve Tc ofset değerleri sırasıyla yaklaşık 85.347 K (R2adj=0.9882) ve 87.421 K (r2adj=0.97465) olarak belirlenmiştir.
In this study, we find a strong link depending on the preparation annealing ambient conditions between structural disorders-defects and characteristic transition temperature parameters (offset, Tc offset and onset, Tc onset) of bulk Bi2.1Sr2.0Ca1.1Cu2.0Oy system for the first time. The superconducting samples are prepared at various annealing temperatures intervals 830°C -850°C with the temperature step of 10°C for annealing time ranging between 24 h and 48 h via traditional solid-state reaction route. The temperature-dependent resistivity measurements are conducted at temperature range of 30-140 K. The most ideal annealing ambient is obtained to be the combination of annealing temperature of 840 °C and annealing time of 24 h because of the enhancement in the formation possibility of strong cooper-pairs and optimization of itinerant charge carrier concentrations in the valence band. Similarly, the positive contributions are observed in the overlapping mechanism of wave functions between Cu-3d and O-2p electrons and especially logarithmic distribution of electronic state densities. The optimum annealing ambient makes the Bi-2212 system refine the structural problems and especially connectivity between the grains in the crystal structure. Conversely, the excess annealing ambient leads to increase considerably the grain misorientation, defects and grain boundary couplings due to the induced permanent problems in the crystal system. The highest correlated model shows that the Bi-2212 superconducting compounds with the minimum structural disorders in the short-range-ordered antiferromagnetic Cu-O2 layers exhibit the maximum Tc onset and Tc offset values of about 85.347 K (R2adj=0.9882) and 87.421 K (R2adj=0. 97465).
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Primary Language en
Subjects Engineering
Journal Section Araştırma Makalesi
Authors

Orcid: 0000-0002-0480-8176
Author: Ümit ERDEM (Primary Author)
Institution: Dr., Kırıkkale University,
Country: Turkey


Orcid: 0000-0002-5177-3703
Author: Gürcan YILDIRIM
Institution: ABANT IZZET BAYSAL UNIVERSITY
Country: Turkey


Supporting Institution -
Project Number -
Thanks -
Dates

Publication Date : June 7, 2021

Bibtex @research article { bitlisfen873698, journal = {Bitlis Eren Üniversitesi Fen Bilimleri Dergisi}, issn = {2147-3129}, eissn = {2147-3188}, address = {}, publisher = {Bitlis Eren University}, year = {2021}, volume = {10}, pages = {393 - 402}, doi = {10.17798/bitlisfen.873698}, title = {Determination of Possible Maximum Critical Transition Temperatures with Empirical Model Depending on Structural Disorders-Defects for Bi2.1Sr2.0Ca1.1Cu2.0Oy System}, key = {cite}, author = {Erdem, Ümit and Yıldırım, Gürcan} }
APA Erdem, Ü , Yıldırım, G . (2021). Determination of Possible Maximum Critical Transition Temperatures with Empirical Model Depending on Structural Disorders-Defects for Bi2.1Sr2.0Ca1.1Cu2.0Oy System . Bitlis Eren Üniversitesi Fen Bilimleri Dergisi , 10 (2) , 393-402 . DOI: 10.17798/bitlisfen.873698
MLA Erdem, Ü , Yıldırım, G . "Determination of Possible Maximum Critical Transition Temperatures with Empirical Model Depending on Structural Disorders-Defects for Bi2.1Sr2.0Ca1.1Cu2.0Oy System" . Bitlis Eren Üniversitesi Fen Bilimleri Dergisi 10 (2021 ): 393-402 <https://dergipark.org.tr/en/pub/bitlisfen/issue/62708/873698>
Chicago Erdem, Ü , Yıldırım, G . "Determination of Possible Maximum Critical Transition Temperatures with Empirical Model Depending on Structural Disorders-Defects for Bi2.1Sr2.0Ca1.1Cu2.0Oy System". Bitlis Eren Üniversitesi Fen Bilimleri Dergisi 10 (2021 ): 393-402
RIS TY - JOUR T1 - Determination of Possible Maximum Critical Transition Temperatures with Empirical Model Depending on Structural Disorders-Defects for Bi2.1Sr2.0Ca1.1Cu2.0Oy System AU - Ümit Erdem , Gürcan Yıldırım Y1 - 2021 PY - 2021 N1 - doi: 10.17798/bitlisfen.873698 DO - 10.17798/bitlisfen.873698 T2 - Bitlis Eren Üniversitesi Fen Bilimleri Dergisi JF - Journal JO - JOR SP - 393 EP - 402 VL - 10 IS - 2 SN - 2147-3129-2147-3188 M3 - doi: 10.17798/bitlisfen.873698 UR - https://doi.org/10.17798/bitlisfen.873698 Y2 - 2021 ER -
EndNote %0 Bitlis Eren Üniversitesi Fen Bilimleri Dergisi Determination of Possible Maximum Critical Transition Temperatures with Empirical Model Depending on Structural Disorders-Defects for Bi2.1Sr2.0Ca1.1Cu2.0Oy System %A Ümit Erdem , Gürcan Yıldırım %T Determination of Possible Maximum Critical Transition Temperatures with Empirical Model Depending on Structural Disorders-Defects for Bi2.1Sr2.0Ca1.1Cu2.0Oy System %D 2021 %J Bitlis Eren Üniversitesi Fen Bilimleri Dergisi %P 2147-3129-2147-3188 %V 10 %N 2 %R doi: 10.17798/bitlisfen.873698 %U 10.17798/bitlisfen.873698
ISNAD Erdem, Ümit , Yıldırım, Gürcan . "Determination of Possible Maximum Critical Transition Temperatures with Empirical Model Depending on Structural Disorders-Defects for Bi2.1Sr2.0Ca1.1Cu2.0Oy System". Bitlis Eren Üniversitesi Fen Bilimleri Dergisi 10 / 2 (June 2021): 393-402 . https://doi.org/10.17798/bitlisfen.873698
AMA Erdem Ü , Yıldırım G . Determination of Possible Maximum Critical Transition Temperatures with Empirical Model Depending on Structural Disorders-Defects for Bi2.1Sr2.0Ca1.1Cu2.0Oy System. Bitlis Eren Üniversitesi Fen Bilimleri Dergisi. 2021; 10(2): 393-402.
Vancouver Erdem Ü , Yıldırım G . Determination of Possible Maximum Critical Transition Temperatures with Empirical Model Depending on Structural Disorders-Defects for Bi2.1Sr2.0Ca1.1Cu2.0Oy System. Bitlis Eren Üniversitesi Fen Bilimleri Dergisi. 2021; 10(2): 393-402.
IEEE Ü. Erdem and G. Yıldırım , "Determination of Possible Maximum Critical Transition Temperatures with Empirical Model Depending on Structural Disorders-Defects for Bi2.1Sr2.0Ca1.1Cu2.0Oy System", Bitlis Eren Üniversitesi Fen Bilimleri Dergisi, vol. 10, no. 2, pp. 393-402, Jun. 2021, doi:10.17798/bitlisfen.873698