Ferroelectric (Ba, Sr)TiO₃thin films for H₂gas detection by sol-gel and RF sputtering

Structural and luminescence properties of Eu3+ doped BaxSr1−xTiO3 (BST) nanocrystalline powders prepared by different methods

“…In particular, ferroelectric titanates (such as BaTiO 3 ) and niobates (such as strontium barium niobates, SBN) are interesting for electrical and optical technological applications due to their high dielectric constants and remarkable non-linear optical properties [3][4][5]. Solid solutions of BaTiO 3 and SrTiO 3 , Ba x Sr 1Àx TiO 3 (BST), have also been recently studied for their applications in microwave devices and gas sensors [6,7]. Much of the research efforts on BST materials have been focused on bulk samples and films [8,9], but only a limited number of papers on nanocrystalline BST has been published [10,11].…”

Microstructure and dielectric properties of ferroelectric barium strontium titanate ceramics prepared by hydrothermal method

“…Figure 2(c) showed that the sample transformed into complete perovskite structure at 800°C. It was indicated that perovskite structure developed through the mutual diffusion between the intermediate phase and TiO 2 phase [4][5][6][7][8]. Figure 3 is the TEM micrographs of BST77 and BST50 powders prepared at 240°C.…”

RF MAGNETRON SPUTTERING CONDITION DEPENDENCES OF DIELECTRIC NON-LINEARITY OF Ba0.6Sr0.4TiO3 THIN FILMS

“…Barium strontium titanate (Ba x Sr 1−x TiO 3 , short for BST) thin films are potential materials for the applications of microwave devices such as dielectric phase shifters and tunable filters due to their high dielectric nonlinearity, low leakage current, long lifetime, good temperature stability and adjusting Curie temperature [1][2][3][4][5][6][7][8]. In particular, dielectric nonlinearity is one of the most important factors for tunable microwave applications.…”

“…Recently, BST thin films have been prepared by several techniques such as pulsed laser deposition (PLD) [4,9], radio-frequency (RF) magnetron sputtering [8,10,11], sol-gel [8,12], metal-organic chemical vapor deposition (MOCVD) and etc [13,14]. It is well known that RF magnetron sputtering is one of the promising methods for BST film deposition due to its high quality of prepared ferroelectric films and easy process control [8,11].…”