کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1666402 1518065 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High-temperature conductivity evaluation of Nb doped SrTiO3 thin films: Influence of strain and growth mechanism
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
High-temperature conductivity evaluation of Nb doped SrTiO3 thin films: Influence of strain and growth mechanism
چکیده انگلیسی
Doped SrTiO3 thin films, 55 nm thick, were epitaxially grown by Pulsed Laser Deposition with niobium contents ranging from 2 to 5 mol% on SrTiO3 and LaAlO3 substrates. The different templates result in different growth defects, film growth mechanism and therefore a different volume fraction of uniformly strained film under the critical thickness. The investigation of the conductivity reveals a significant difference between the two substrate choices, but only at elevated temperatures with conductivity values up to 30% larger for films on SrTiO3 substrates compared with LaAlO3. Whereas in bulk ceramics the niobium level dictates the total conductivity, here it was found that the substrate choice had a greater influence for thin films, in particular at temperatures over 400 °C. This finding provides important information on conductive layers in complex heterostructures where strain and defects could work cooperatively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 539, 31 July 2013, Pages 384-390
نویسندگان
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