کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9841708 | 1525795 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Large vortex-density fluctuations induced by current in the Corbino-disk
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
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چکیده انگلیسی
We have studied the vortex dynamics driven by the constant current I in the Meissner phase of a thick amorphous MoxSi1âx film with the Corbino-disk contact geometry. In the certain I region we have observed unusual large voltage pulses that oscillate almost periodically with a period t0 larger than â¼15 s and with the pulse width tw in the range 5-10Â s. With increasing I, t0 initially decreases and then increases. Over the whole I region where the oscillation of V(t) is observed, both t0 and tw are much longer than the characteristic time for free vortices to rotate in the circles. At high I a small peak(s) or cusp-like structure exceeding the normal-state voltage appears on the top (plateau) region of the pulses. These results indicate that the observed voltage pulses originate from large vortex-density fluctuations of moving vortices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica C: Superconductivity - Volumes 426â431, Part 1, 1 October 2005, Pages 158-162
Journal: Physica C: Superconductivity - Volumes 426â431, Part 1, 1 October 2005, Pages 158-162
نویسندگان
S. Okuma, S. Morishima, M. Kamada,