Fabrication of single crystalline Bi-2212 whisker with addition of Sb2O3 into the Bi2Sr2Ca2Cu3Ox system and their thermal, structural and superconducting properties
Küçük Resim Yok
Tarih
2011
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Single crystalline Bi-based superconducting whiskers have been fabricated from a melt quenched Bi2SbSr2Ca2Cu3Ox. precursor using suitable heat treatment cycles. Whiskers fabricated in this study have 6-15 mu m thickness, 60-95 mu m width and 1-3 mm length. Crystallization activation energy of the material fabricated was calculated to be 609 kJmol(-1) by Kissinger method. Structural and micro-structural changes with the heating treatment cycles were analyzed by XRD and SEM-EDX. It was found that whiskers have pure c-axis oriented single crystalline Bi2Sr2CaCu2Ox (Bi-2212) phase with very smooth surface and without cracks and dislocations. Sb ions did not diffuse directly to the structure of whiskers. But Sb ions added to the system caused to decrease the number of whiskers. Temperature dependence of resistivity was analyzed along both the a- and c-axis. The superconducting transition temperature. To of the whiskers was found to be 93.8 K for the a-axis resistivity and 90.9 K for the c-axis resistivity, respectively. The transport critical current density, integral(trans)(c) was found as 2.6 x 10(5) A/cm(2) at 10 and 1.1 x 10(5) at 70 K. Magnetization hysteresis (M-H) was investigated at three different temperatures (10, 20 and 30 K). Magnetic critical current densities, integral(mag)(c), of whiskers were determined using the Bean's Model. (C) 2011 Elsevier Masson SAS. All rights reserved.
Açıklama
Anahtar Kelimeler
Bi-2212 Whisker, Single crystal superconductors, Bi-2212, Sb adding on BSCCO
Kaynak
Solid State Sciences
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
13
Sayı
5
