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Piezoresponse force microscopy and dielectric spectroscopy study of Ba_(0.6)Sr_(0.4)TiO_(3)thin films

Journal of Advanced Dielectrics 2019年第3期9卷 29-35页

作者： dionizy czekaj Agata Lisińska-czekaj Department of Materials Engineering and Welding Faculty of Mechanical Engineering Gdansk University of Technology 11/12 Narutowicza St.Gdansk 80-233Poland

Research on synthesis,characterization and determination of processing-structure-property relationships of commercially important ferroelectric thin films has been *** sol-gel type solution deposition technique was applied to produce good quality thin films of Ba_(0.6)Sr_(0.4)TiO_(3)(BST60/40)chemical composition on the stainless steel *** thin films were characterized in terms of their microstructure,crystal structure,phase composition,piezoelectric and dielectric *** was found that the BST60/40 thin film adopted the cubic structure at room temperature with an elementary cell parameter a-3:971e8TÅ.Morphology of the thin film surface was studied with Atomic Force Microscopy(AFM).Average roughness of the thin films surface was found(Sa=0:055μm).Piezoresponse Force Microscopy(PFM)was applied for the thin film *** piezoelectric regions were found in BST60/40 thin ***,dielectric response measured at room temperature was studied in assumption of piezoelectric electric equivalent circuit.

关键词： Thin film Ba_(0.6)Sr_(0.4)TiO_(3) crystal structure dielectric spectroscopy piezoresponse force microscopy

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INFLUENCE OF Mg-DOPING ON SYNTHESIS OF SOL-GEL DERIVED BST THIN FILMS

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Journal of Advanced Dielectrics 2012年第1期2卷 107-116页

作者： dionizy czekaj AGATA LISIŃSKA-czekaj University of Silesia Department of Materials Science 2Sniezna St.Sosnowiec41-200Poland

Solid solutions of Ba_(1-x)Sr_(x)TiO_(3)(BST)type are very attractive for application in information technology,but also in microwaves for such electrically controlled devices as phase shifters,tunablefilters,steerable antennas,varactors,*** the present study thinfilms of a BST solid solution with x=0.4(BST60/40)were prepared by the sol-gel-type chemical solution deposition *** influence of y=1,3 and 5 mol.%MgO doping on synthesis of BST60/40 thinfilms was *** analysis both differential and thermogravimetric were used to determine the thermochemical properties of dried BST60/40-MgO gel powders.A multilayer spin-coating approach was utilized for the Ba_(0.6)Sr_(0.4)TiO_(3)-MgO thinfilm deposition on stainless steel substrates.X-ray diffraction analysis,SEM and EDS were utilized for thinfilm characterization in terms of its crystalline structure,microstructure and chemical *** spectroscopy investigation of MgO-doped Ba_(0.6)Sr_(0.4)TiO_(3)thinfilms grown on stainless steel substrates were also performed within the wavenumber range k=40-1070 cm^(-1).

关键词： (Ba_(0.6)Sr_(0.4))ÞTiO_(3) solgel method ferroelectric thinfilms Raman spectroscopy

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