کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10629409 | 991063 | 2016 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
BaTiO3-CoFe2O4-BaTiO3 trilayer composite thin films prepared by chemical solution deposition
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Multiferroic BaTiO3-CoFe2O4-BaTiO3 thin films were synthesized by spin coating of Co(NO3)2-Fe(NO3)3 and Ba(OAc)2-Ti(i-OPr)4 dissolved in a mixture of acetic acid and dimethylformamide. Stepwise thermal treatment at 200, 400 and 800 °C led to the desired phases. The phase formation process was monitored by thermoanalytic, XRD, IR and Raman measurements. SEM was used to characterize the structure and thickness of each layer. Two samples with different thicknesses of perovskite and spinel layers are discussed. Sample 1 consists of 120 nm CoFe2O4 between two 70 nm BaTiO3 layers. For sample 2, the 90 nm BaTiO3 top and bottom layers are enclosing 220 nm CoFe2O4. The surface qualities were determined by AFM indicating rms roughness values of about 4 nm. Magnetic investigations reveal slightly anisotropic behavior. Polarization measurements show hysteresis loops (PS(max) = 29 μC cmâ2; PR(max) = 17 μC cmâ2) with switching peaks at the corresponding coercive fields.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 36, Issue 3, February 2016, Pages 559-565
Journal: Journal of the European Ceramic Society - Volume 36, Issue 3, February 2016, Pages 559-565
نویسندگان
Till Walther, Norman Quandt, Roberto Köferstein, Robert Roth, Matthias Steimecke, Stefan G. Ebbinghaus,