کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1820742 1525787 2006 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Upper critical fields of ferromagnet/superconductor layered structures
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Upper critical fields of ferromagnet/superconductor layered structures
چکیده انگلیسی
The temperature dependence of the upper critical fields, both perpendicular Hc2⊥ and parallel Hc2∥ to layer planes of ferromagnet/superconductor bi- and multilayers, is theoretically investigated. The secular equation of the superconducting order parameter for determining the phase diagram (H, T) is obtained by solving exactly the linearized Usadel equations in the multimode method taking into account the material parameter values. For the bilayers system, the influence of the boundary resistivity on the critical fields, and the dimensional crossover behavior of Hc2∥(T) are studied in details. For the multilayered structure, the effects of the π-phase state on both the superconducting transition temperature Tc and the upper critical fields (Hc2⊥, and Hc2∥) are also considered. The nonmonotonic Tc behaviors are predicted. The interplay between 0- and π-phases leading to the strong oscillations of Tc as well as the temperature dependence of the zero temperature critical fields on the ferromagnetic layer thickness are investigated theoretically.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica C: Superconductivity - Volume 440, Issues 1–2, 1 July 2006, Pages 25-34
نویسندگان
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