Improved Tunability and Energy Storage Density Properties of Low-Loss, Lead-Free (Ba0.50Sr0.50)TiO3 and Ba(Zr0.15Ti0.85)O3 Bilayer Thin Film Stacks

Mahesh, M. L. V. and Pal, Prem and Prasad, V. V. Bhanu and et al, . (2022) Improved Tunability and Energy Storage Density Properties of Low-Loss, Lead-Free (Ba0.50Sr0.50)TiO3 and Ba(Zr0.15Ti0.85)O3 Bilayer Thin Film Stacks. Journal of Electronic Materials, 51 (2). pp. 727-735. ISSN 0361-5235

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Abstract

Multilayer thin films of (Ba0.50Sr0.50)TiO3 (BST) and Ba(Zr0.15Ti0.85)O3 (BZT) were designed and grown using pulsed laser deposition technology. The periodic (BST/BZT)n thin films were deposited on Pt‹111›/SiO2/Si substrates. X-ray diffraction revealed the presence of a polycrystalline, perovskite structure corresponding to the bilayer thin film stacks. Scanning electron microscopy confirmed the multilayer structure without any interdiffusion across layers. It was also found that the dielectric and ferroelectric properties of the thin films were strongly influenced by the periodic heterostructures. The thin film stacks exhibited significantly higher tunability as compared with multilayer thin films grown on various single-crystal substrates such as LaAlO3, MgO and SrTiO3. Possible mechanisms explaining the other observed attributes such as improved dielectric properties and reduced leakage current are discussed. The effect of incorporating a comparatively lower-permittivity thin film in the multilayer stacks is presented. The observed properties of such multilayer structured films will aid in realizing low-loss and highly tunable applications. © 2021, The Minerals, Metals & Materials Society.

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IITH Creators:

IITH Creators	ORCiD
Pal, Prem	https://orcid.org/0000-0001-7345-9769

Item Type:

Article

Additional Information:

The authors acknowledge financial support from the Defence Research and Development Organization, Ministry of Defence, New Delhi for carrying out the present work. Also, the authors would like to thank the Director of Defence Metallurgical Research laboratory (DMRL) for permitting publication of this work.

Uncontrolled Keywords:

dielectric properties; electric field distribution; energy storage density; leakage current; Multilayer thin films; tunability

Subjects:

Others > Metallurgy Metallurgical Engineering
Physics

Divisions:

Department of Material Science Engineering
Department of Physics

Depositing User:

. LibTrainee 2021

Date Deposited:

13 Jul 2022 13:35

Last Modified:

13 Jul 2022 13:35