کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1594263 | 1515662 | 2010 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermal conductivity and thermo-power of Y1âxPrxBa2(Cu1âxMx)3O7âδ (M=Fe,Mn,Zn and Ni) bulk superconductors
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
In this paper, we present temperature dependent electrical conductivity Ï(T), thermal conductivity κ(T) and thermoelectric power S(T) for co-doped superconducting compounds Y 0.95Pr0.5Ba2(Cu1âxMx)3O7âδ(M=Fe,Mn,Zn and Ni). The XRD patterns confirm that all the samples are single phased. Pristine Y Ba2Cu3O7âδ depicts a pronounced hump-like structure in κ(T) below its transition temperature. With Pr-doping, a reduction in the peak height of the hump is observed. It is found that the hump structure is further suppressed with transition metal co-doping, and is viewed in terms of the phonon scattering with defect structure, electrons and phonons. S(T) data depicting a sign reversal with co-doping, has been analyzed in the framework of a narrow band model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 150, Issues 9â10, March 2010, Pages 454-457
Journal: Solid State Communications - Volume 150, Issues 9â10, March 2010, Pages 454-457
نویسندگان
Tirthankar Chakraborty, Bhasker Gahtori, M.A.H. Ahsan, Geetha Geetha, Y.-S. Chen, Y.-K. Kuo, Ashok Rao, Chandan Kumar Sarkar, S.K. Agrawal,