Influence of deposition temperature on microstructure and electrical properties of modified (Ba, Sr)TiO3 ferroelectric thin films

Effect of electric field on the dielectric properties of the Barium Strontium Titanate film

“…Due to the excellent nonlinear optical properties, ferroelectric and electro-optical physical properties and comprehensive application in various areas, ferroelectric materials have been drawn great attention both in scientific research and technology development [1]. The ferroelectric perovskite oxide materials Barium Strontium Titanate (BaxSr1-xTiO3) has attracted great interests for several decades due to its low loss and composition dependent Curie temperature (Tc) [2], which ranges from -163 to 120℃ as x could varied from 0 to 1 continuously. Now Ba1-xSrxTiO3 has been widely used in the design of electronic devices intended for controlling radiation in the optical and microwave frequency ranges [3], and used in the dynamic random access memories [4,5] and the functional elements in devices [6,7].…”

Optical-induced absorption tunability of Barium Strontium Titanate film

“…BST materials are promising candidates for use in the design of electronic devices intended for controlling radiation in the optical and microwave frequency ranges [4]. Ba 1-x Sr x TiO 3 is currently a material for microwave applications due to its low loss and composition dependent Curie temperature (Tc) [5], which ranges from -163 to 120℃ for x=0 to x=1 respectively.…”

“…In order to make up the defects of the bulk BST, such as the sintering temperature demands very high to obtain good crystallinity, the dielectric constant is too high to inevitably leads to a very complicated impedance © 2016. This manuscript version is made available under the Elsevier user license http://www.elsevier.com/open-access/userlicense/1.0/ matching circuit [5], we prefer to do the research on the BST film.…”

“…Thin film BST offers advantages over bulk BST for tunable applications. Large electric fields (0-400 kV/cm) can be achieved in thin film BST (224 nm) using low voltages [5]. And on the modulate properties of the thin film BST, many methods have been proposed in literature.…”

“…Ferroelectric materials, which are characterized by a high permittivity up to the THz range [7] offer a possibility of its tuning by means of external field. Whereas, these tunable properties are most researched in the microwave region [8,9] or in the terahertz range but by the means of dc electric-field [7-9], or by the means of codoping and adjusting sintering temperature for attain the high modulation of Ba0.67Sr0.33TiO3 ceramics [5], or adopted the method of temperature control [5]. One of the works where STO shows large change in the complex refrtactive index with temperature [10], although the modulation capability is superior to the pumped optical tunability, the thermal tunability was not so accurate.…”