کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1672903 | 1008941 | 2008 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of substrate on the pulsed laser deposition growth and microwave behaviour of KTa0.6Nb0.4O3 potassium tantalate niobate ferroelectric thin films
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Thin films of potassium tantalate niobate KTa0.6Nb0.4O3 (KTN) were grown by pulsed laser deposition on five different substrates suitable for microwave devices: (100)MgO, (100)LaAlO3, (1-102)sapphire (R-plane), (0001)sapphire (C-plane) and alumina. The high volatility of potassium at the film growth temperature required the addition of an excess of potassium to the ablation target. For optimized deposition conditions, Rutherford backscattering showed that the KTN films had a 1: 1 atomic ratio for K:(Nb + Ta). As grown KTN thin films were single-phase, without any particular orientation on sintered alumina, whereas an epitaxial growth with the (100) orientation was achieved on (100)MgO and (100)LaAlO3 with a mosaicity ÎÏ(100)KTN close to 0.7°-1.5° and â¼Â 0.4°-0.9°, respectively, attesting a high crystalline quality. In contrast, growth of KTN on R-plane sapphire results in a texture with the (100) orientation and the presence of the (110) orientation as a secondary one. The room temperature measurements carried out on Au interdigited capacitors patterned on KTN coated (100) LaAlO3 and sapphire led at 1 GHz to an agility ÎC / C â¼Â 4.6% and â¼Â 7.2%, respectively, for a moderate applied field of 15 kV cmâ 1. Stubs patterned on the same systems led to an agility ÎFr / Fr of â¼Â 2.2% and 4.2%, respectively, for Fr = 7 GHz and the same applied field.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 516, Issue 15, 2 June 2008, Pages 4882-4888
Journal: Thin Solid Films - Volume 516, Issue 15, 2 June 2008, Pages 4882-4888
نویسندگان
A. Rousseau, V. Laur, S. Députier, V. Bouquet, M. Guilloux-Viry, G. Tanné, P. Laurent, F. Huret, A. Perrin,