کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1818010 | 1525717 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Multiple superconducting transition and phase separation in melt-textured YBa2Cu3O7âd
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We report on careful measurements of the temperature derivative of the resistivity, dÏ/dT, in the region encompassing the superconducting transition of melt-textured samples of the YBa2Cu3O7âd cuprate superconductor. Measurements were carried out in orientations parallel and perpendicular to the Cu â O2 atomic planes in the presence of small magnetic fields applied parallel to the current orientation. The dÏ/dT results reveal the occurrence of complex multi-peak structures that were analyzed with a new method based on the assumption that a simple series association of conductivities is adequate for describing the resistive transition of multiphased superconductors. We ascribe the multi-peak structure observed in the derivative measurements to a subtle and complex phase separation phenomenon leading to the stabilization of domains having slightly different electronic properties that are related to the ordering of labile oxygen atoms in the YBa2Cu3O7âd chain sub-structure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica C: Superconductivity - Volume 495, 15 December 2013, Pages 202-207
Journal: Physica C: Superconductivity - Volume 495, 15 December 2013, Pages 202-207
نویسندگان
R. Menegotto Costa, F.T. Dias, P. Pureur, X. Obradors,