Issue 34, 2013
From the journal:

CrystEngComm

Enhanced dielectric properties of (Ba,Sr)TiO3//Ba(Zr,Ti)O3 heterostructures with optimized structure design

Ming Liu,ab   Jian Liu,b   Chunrui Ma,b   Gregory Collins,b   Chonglin Chen,*bc   Andy D. Alemayehu,d   Guru Subramanyam,d   Jie He,e   Jiechao Jiang,e   Efstathios I. Meletise  and  Amar Bhallaf  

* Corresponding authors

a Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an 710049, P. R. China

b Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, TX 78249, United States
E-mail: cl.chen@utsa.edu

c The Texas Center for Superconductivity, University of Houston, Houston, TX 77204, United States

d Department of Electrical and Computer Engineering, University of Dayton, Dayton, Ohio 45469, United States

e Department of Material Science and Engineering, University of Texas at Arlington, Arlington, TX, United States

f Department of Electrical and Computer Engineering, University of Texas at San Antonio, San Antonio, TX 78249, United States

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.

Graphical abstract: Enhanced dielectric properties of (Ba,Sr)TiO3//Ba(Zr,Ti)O3 heterostructures with optimized structure design

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Article information

DOI
https://doi.org/10.1039/C3CE27106D
Article type
Communication
Submitted
29 Dec 2012
Accepted
10 May 2013
First published
13 May 2013

CrystEngComm, 2013,15, 6641-6644

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Enhanced dielectric properties of (Ba,Sr)TiO3//Ba(Zr,Ti)O3 heterostructures with optimized structure design

M. Liu, J. Liu, C. Ma, G. Collins, C. Chen, A. D. Alemayehu, G. Subramanyam, J. He, J. Jiang, E. I. Meletis and A. Bhalla, CrystEngComm, 2013, 15, 6641 DOI: 10.1039/C3CE27106D

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