کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1817851 | 1525718 | 2013 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fe/Ba(Fe1âxCox)2As2 multilayers and quasi-multilayers with Tc = 29 K
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
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چکیده انگلیسی
In this work we present multilayers consisting of Fe and Co-doped BaFe2As2 fabricated by UHV pulsed laser deposition. Employing the advantage of a coherent interfacial bonding between the FeAs tetrahedra of the iron pnictide and bcc Fe enables the growth of epitaxial bi- and multilayers of Fe and the new Fe-based superconductors with high crystalline quality. Epitaxial growth of the multilayers was controlled in situ by reflection high energy electron diffraction (RHEED) and after film growth by X-ray diffraction and TEM analysis. The stoichiometry determined by Auger electron spectroscopy (AES) indicated As-deficient layers of Co-doped Ba-122. The multilayers exhibit critical temperatures of Tc,90Â =Â 29Â K which is so far the highest critical temperature reported for Co-doped Ba-122. We propose that the Tc-enhancement is caused by As-vacancies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica C: Superconductivity - Volume 494, 15 November 2013, Pages 185-188
Journal: Physica C: Superconductivity - Volume 494, 15 November 2013, Pages 185-188
نویسندگان
J. Engelmann, K. Iida, F. Kurth, C. Behler, S. Oswald, R. Hühne, B. Holzapfel, L. Schultz, S. Haindl,