Au katkılı Bi-2212 süperiletkenlerin yapısal, elektriksel ve manyetik özellikleri

Yıl 2021, Cilt: 27 Sayı: 1, 70 - 77, 08.02.2021

Esen Gül Berdan Özkurt Mehmet Ersin Aytekin Kasım Ocakoğlu

Öz

Bu çalışmada, Bi1.8Sr2Ca1.1Cu2.1Oy+Aux (x=0.0, 0.05, 0.1 ve 0.2) genel formülü ile Bi-2212 fazının fiziksel ve manyetik özellikleri üzerine nano boyutta Au eklemenin etkileri sunulmuştur. Örnekler katıhal tepkime yöntem ile hazırlanmıştır. Malzeme hazırlama sürecinde kullanılan Au elementi, HAuCl4.3H2O bileşiğinin indirgenmesinden elde edilmiştir. Örneklerin fiziksel, morfolojik ve süperiletkenlik özellikleri XRD, taramalı elektron mikroskobu (SEM), dc elektrik direnci ve manyetik hysteresis eğrileri ölçümleriyle karakterize edildi. Bi-2212 fazının baskın bir şekilde oluşumunu gösteren, saf ve Au ekli örnekler plaka benzeri tane yapısına sahiptir. Elektrik direnç sonuçları x=0.2 HAuCl4.3H2O içeren örneğin, bakır-oksit tabaklarda ideal hole konsatrasyonun oluşumuna bağlı olarak en yüksek geçiş sıcaklığına (TC) sahip olduğunu göstermektedir. Ayrıca, M-H ölçümleri T=10 ve T=25 K de gerçekleştirildi. Tanelerin daha güçlü birleşmesine bağlı olarak en geniş hysteresis eğrisi, maksimum HAuCl4.3H2O ekli örnek de elde edilmiştir.

Anahtar Kelimeler

Au ekleme, Süperiletkenlik, Özdirenç, Manyetik histerezis

Kaynakça

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