Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/27104
Title: Dielectric properties of (100)-oriented Ba(Zr, Ti)O3/La 0.7Ca0.3MnO3 heterostructure thin films prepared by pulsed laser deposition
Authors: Tang, XG
Zheng, RK
Jiang, YP
Chan, HLW 
Issue Date: 2006
Source: Journal of physics. D, Applied physics, 2006, v. 39, no. 15, 026, p. 3394-3399
Abstract: Highly (100)-oriented Ba(Zr0.2Ti0.8)O 3/La0.7Ca0.3MnO3 (BZT/LCMO) heterostructure thin films have been grown on Si(100) and Pt(111)/Ti/SiO 2/Si(100) substrates prepared by pulsed laser deposition. The structure and surface morphology of the films have been characterized by x-ray diffraction and atomic force microscopy. The dielectric constant of the films changes significantly with applied dc bias field and the films have high tuneability of 59.1%, 52% and 59.4% at an applied field of 400 kV cm -1, respectively, for the BZT film on Pt/Ti/SiO2/Si and the BZT/LCMO heterostructure films on Si and Pt/Ti/SiO2/Si substrates. The tuneability of the BZT/LCMO thin films on Pt-coated Si substrate was higher than that of the BZT thin films on Pt/Ti/SiO2/Si and LCMO/Si substrates. The high tuneability has been attributed to the (100) texture of the films and larger grain sizes. The BZT thin film is an attractive candidate for tuneable microwave device applications.
Publisher: Institute of Physics Publishing
Journal: Journal of physics. D, Applied physics 
ISSN: 0022-3727
EISSN: 1361-6463
DOI: 10.1088/0022-3727/39/15/026
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