کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5497560 1531902 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructure and superconducting properties of Ca substituted Y(Ba1−xCax)2Cu3O7−δ ceramics prepared by thermal treatment method
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
Microstructure and superconducting properties of Ca substituted Y(Ba1−xCax)2Cu3O7−δ ceramics prepared by thermal treatment method
چکیده انگلیسی
The effect of Ca substitution in Ba site of Y(Ba1−xCax)2Cu3O7−δ, (x = 0.00, 0.04, 0.08, 0.1 and 0.125), ceramics prepared by thermal treatment method was investigated. Surface morphology, structural and superconducting were studied using field emission electron microscope (FESEM), X-ray Diffraction (XRD) and four-probe method. FESEM analysis showed an increasing of samples' grain size, homogeneity and compactness with increasing of Ca substitution. From XRD, the samples had orthorhombic crystal structure of space group Pmmm besides small amount of unknown peaks. The critical temperature (Tc R=zero) decreased from 87 K for the pure sample to 80 K for sample with x = 0.08, and it remained the same for samples with x ⩾ 0.08. Sample with x = 0.04 showed the sharpest superconducting transition (ΔTc), which could be due to good microstructure morphology and better crystallinity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Results in Physics - Volume 7, 2017, Pages 407-412
نویسندگان
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