A Study on magnetoresistivity, activation energy, irreversibility and upper critical field of slightly Mn added Bi-2223 superconductor ceramics
Yükleniyor...
Dosyalar
Tarih
2012
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
This study discusses the effect of Mn addition on the superconducting and physical properties in Bi1.8Pb0.4Sr2Mn (x) Ca2.2Cu3.0O (y) bulk superconductors with x=0,0.03,0.06,0.15,0.3, and 0.6 by means of the magnetoresistivity measurements. The magnetoresistivity of the samples prepared using the standard solid-state reaction method was measured for different values of the applied magnetic field strengths. The superconducting and physical properties of the samples such as the zero resistivity transition temperatures (T (c) ), irreversibility fields (mu (0) H (irr) ), and upper critical fields (mu (0) H (c2)) were deduced from the magnetoresistivity curves. Moreover, thermally activated flux creep model was studied for activation energy (U (0)) values of the samples. According to the results of the measurements, not only were the T (c) and U (0) values of the samples found to decrease significantly but the mu (0) H (irr) and mu (0) H (c2) values were also observed to reduce with the increase in the Mn addition, indicating that the doping degrades the physical and superconducting properties of the samples.
Açıklama
Anahtar Kelimeler
Bi-1.8Pb0.4Sr2MnxCa2.2Cu3.0Oy, Magnetoresistivity, Activation Energy, Irreversibility Field, Upper Critical Field
Kaynak
Journal Of Superconductivity And Novel Magnetism
WoS Q Değeri
Q4
Scopus Q Değeri
Q3
Cilt
25
Sayı
4
