Title

Enhanced dielectric properties of (Ba,Sr)TiO3//Ba(Zr,Ti)O-3 heterostructures with optimized structure design

Document Type

Article

Publication Date

5-2013

Publication Source

Crystal Engineering Communications

Abstract

Environment-friendly ferroelectric Mn:BST//Mn:BZT heterostructures were epitaxially deposited on (001) MgO substrates by pulsed laser deposition with different combination ratios of Mn:BST over Mn:BZT, 2.5:7.5; 1:1; and 7.5:2.5. The microstructural studies indicate that the in-plane interface relationships between the heterostructures and the substrate are determined to be (001)Mn:BST//(001)Mn:BZT//(001)MgO and [100]Mn:BST//[100]Mn:BZT//[100]MgO. The Ku band microwave (15.5–18 GHz) dielectric property characterizations show that the dielectric constant, dielectric loss, and tunabilities of the heterostructures are highly dependent upon the sequences of Mn:BST to Mn:BZT. The optimized dielectric tunability with a low loss tangent was found to be 58.1%–74.4% under the combination ratio of 1:1 for Mn:BST to Mn:BZT, which suggests that the as-grown ferroelectric heterostructures can be developed for room temperature tunable microwave elements and related device applications.

Inclusive pages

6641-6644

ISBN/ISSN

1466-8033

Comments

Reproduced by permission of the Royal Society of Chemistry (RSC). Permission documentation is on file.

Publisher

Royal Society of Chemistry

Volume

15

Issue

34

Peer Reviewed

yes