کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5492272 | 1525672 | 2017 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Flux pinning properties in BaPb0.77Bi0.23O3âδ compound
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
The superconducting properties of BaPb0.77Bi0.23O3âδ compound were tested by transport and magnetization measurements from 2 to 14 K. The R-T curve at various magnetic fields is similar to that for MgB2 superconductors. The temperature dependence of resistance below 10% of normal state resistance follows Arrhenius law and the field dependence of effective flux pinning energy shows an exponential behavior, Ueff=U(0)exp(â0.48H). The Hc-T line down to 2 K displays a power law, Hc(T)â(1âT/Tc)n. The field dependence of flux pinning force displays two peaks originated from the intragrains and intergrains, respectively. The scaling result of Dew-Hughes model, Fp=Ahp(1âh)q, suggests that the flux pinning in the sample is the collective pinning of normal surface and point centers. The field dependence of critical current density shows a power law in the low magnetic field region and an exponential behavior, Jc=Jc0exp(âβH), in high magnetic field region.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica C: Superconductivity and its Applications - Volume 542, 15 November 2017, Pages 23-27
Journal: Physica C: Superconductivity and its Applications - Volume 542, 15 November 2017, Pages 23-27
نویسندگان
Peihuan Yin, Renfei Xiao, Xiaochun Xu, Tianfeng Duan, Zhihe Wang,