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Updated: Jun 18, 2026
Radio Frequency Magnetron Sputtering of GdBa2Cu3O7−δ/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 (STO) Single-crystal Substrates
Published on: April 12, 2019
Enhanced dielectric properties of nanocrystalline (Ba0.65Sr0.35)TiO3 thin films grown on CaRuO3 buffer layers
H F Xiong1, X G Tang, L L Jiang
1School of Physics and Optoelectric Engineering, Guangdong University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510006, People's Republic of China.
Abstract:
Highly (100)-oriented and (110)-oriented (Ba0.65Sr0.35)TiO3 (BSTO) and (Ba0.65Sr0.35)TiO3/CaRuO3 (BSTO/CRO) heterostructure thin films, have been grown on Pt/Ti/SiO2/Si substrates prepared by pulsed laser deposition (PLD). The structure and surface morphology of the films have been characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The dielectric constants of the films changes significantly with applied dc bias field and have high tunability of 76.3% and 78.1% at an applied field of 256.3 kV/cm, respectively for BSTO and BSTO/CRO thin films on Pt/Ti/SiO2/Si substrates. The tunability of the BSTO/CRO heterostructure thin films on Pt/Ti/SiO2/Si substrate was higher than that of the BSTO thin films on Pt/Ti/SiO2/Si substrate. The high tunability has been attributed to the (110) texture of the films and lager grain sizes.
