کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1507940 993941 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Study of phonon modes and superconducting properties of the oxygen post-annealed (Cu0.5Tl0.5)Ba2Can−1(Cun−yGey)O2n+4−δ (n = 3, 4 and y = 0, 0.5, 0.75, 1.0) superconductors
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Study of phonon modes and superconducting properties of the oxygen post-annealed (Cu0.5Tl0.5)Ba2Can−1(Cun−yGey)O2n+4−δ (n = 3, 4 and y = 0, 0.5, 0.75, 1.0) superconductors
چکیده انگلیسی

Superconducting properties of the Ge doped (Cu0.5Tl0.5)Ba2Can−1(Cun−yGey)O2n+4−δ (n = 3, 4 and y = 0, 0.5, 0.75, 1.0) superconductors have been enhanced by carrying out annealing in the flowing oxygen atmosphere. With Ge doping superconducting properties were suppressed but after the oxygen annealing substantial enhancement has been observed in both critical temperature and magnetic susceptibility in all the samples. The enhanced superconductivity in the post-annealed samples is most likely caused by the optimization of the carrier density in the conducting CuO2/GeO2 planes. Oxygen related various phonon modes of these samples have also been investigated and possible role of Ge in modifying these modes has been discussed. Since properties of Ge are very well known, therefore, its doping can be useful for understanding of mechanism of superconductivity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cryogenics - Volume 50, Issue 2, February 2010, Pages 61–65
نویسندگان
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