کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1673465 1008948 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dielectric and microstructural properties of barium titanate hafnate thin films
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Dielectric and microstructural properties of barium titanate hafnate thin films
چکیده انگلیسی

Barium titanate hafnate (BaTi1−xHfxO3, 0 ≤ x ≤ 0.25) thin films have been deposited by a chemical solution method on copper foil substrates. The films were crystallized at 900 °C and in a reducing atmosphere to prevent substrate oxidation. Perovskite phase formation was identified for each composition, accompanied by an increased pseudocubic lattice parameter. Temperature dependent dielectric measurements revealed a decreasing phase transition temperature and peak permittivity with increasing hafnium level. The decrease in permittivity resulted from grain size reduction with increasing hafnium content. Compositions containing 25 mol% barium hafnate display a deviation from Curie–Weiss behavior indicating the onset of relaxor behavior.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 516, Issue 10, 31 March 2008, Pages 3162–3166
نویسندگان
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