کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1897068 1044485 2011 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Maximizing critical currents in superconductors by optimization of normal inclusion properties
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات ریاضیات کاربردی
پیش نمایش صفحه اول مقاله
Maximizing critical currents in superconductors by optimization of normal inclusion properties
چکیده انگلیسی

The movement of vortices in superconductors due to an applied current can induce a loss of perfect conductivity. Experimental observations show that material impurities can effectively prevent vortices from moving. In this paper, we provide numerical studies to investigate vortex pinning and critical currents through the use of an optimal control approach applied to a variant of the time-dependent Ginzburg–Landau model that can account for normal inclusions. The effects that the size and boundary of the sample and the number, size, shape, orientation, and location of the inclusion sites have on the critical current and vortex lattices are studied. In particular, the optimal control approach is used to determine the optimal properties of the impurities so as to maximize the critical current, i.e., the largest current that can pass through a superconductor without resistance.


► We study the pinning of vortices by embedding normal inclusions into a superconductor material.
► We use an optimal control approach to determine the critical current.
► Effects of different normal inclusion properties on critical current are investigated.
► Optimal properties of impurities to maximize the critical current are studied in detail.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica D: Nonlinear Phenomena - Volume 240, Issue 21, 15 October 2011, Pages 1701–1713
نویسندگان
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