کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1608083 | 1516242 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Polymorphous GdScO3 as high permittivity dielectric
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Four different polymorphs of GdScO3 are assessed theoretically and experimentally with respect to their suitability as a dielectric. The calculations carried out by density functional theory reveal lattice constants, band gaps and the energies of formation of three crystal phases. Experimentally all three crystal phases and the amorphous phase can be realized as thin films by pulsed laser deposition using various growth templates. Their respective crystal structures are confirmed by X-ray diffraction and transmission electron microscopy reflecting the calculated lattice constants. X-ray photoelectron spectroscopy unveils the band gaps of the different polymorphs of GdScO3 which are above 5Â eV for all films demonstrating good insulating properties. From capacitance voltage measurements, high permittivities of up to 27 for hexagonal GdScO3 are deduced.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 651, 5 December 2015, Pages 514-520
Journal: Journal of Alloys and Compounds - Volume 651, 5 December 2015, Pages 514-520
نویسندگان
A. Schäfer, K. Rahmanizadeh, G. Bihlmayer, M. Luysberg, F. Wendt, A. Besmehn, A. Fox, M. Schnee, G. Niu, T. Schroeder, S. Mantl, H. Hardtdegen, M. Mikulics, J. Schubert,