کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1819995 1525774 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High field matching effects in superconducting Nb porous arrays catalyzed from anodic alumina templates
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
High field matching effects in superconducting Nb porous arrays catalyzed from anodic alumina templates
چکیده انگلیسی

Vortex pinning in a superconducting Nb thin film deposited on an anodically grown alumina template is investigated. Anodic oxidation of aluminium layers permits under specific conditions the formation of highly ordered porous alumina, a membrane-like structure consisting of triangular arrays of parallel pores. Its pore diameter and interpore distance are set by careful tuning of the anodization parameters. A superconducting Nb thin film is deposited directly onto the alumina film. The porous alumina acts as a template and it allows Nb to form a periodic pinning array during its growth. Pinning force vs. field measurements derived from magnetization measurements, show matching effects in fields up to 1 T. We demonstrate that the anodic alumina template with 50 nm interpore spacing provides enhanced vortex pinning in a large field and temperature range.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica C: Superconductivity - Volume 459, Issues 1–2, 1 August 2007, Pages 5–10
نویسندگان
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