Management of Lead Content for Growth of {001}‐Oriented Lead Magnesium Niobate‐Lead Titanate Thin Films. Issue 4 (2nd March 2016)

• Record Type: Journal Article
• Authors: Keech, Ryan; Shetty, Smitha; Wang, Ke; Trolier‐McKinstry, Susan
• Editors: Ballarini, R.
• Is Part Of: Journal of the American Ceramic Society. Volume 99:Issue 4(2016)
• Page Start: 1144
• Page End: 1146
• Publication Date: 2016-03-02
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.14191
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract : A scalable growth process for domain engineered {001}‐oriented lead magnesium niobate—lead titanate (PMN‐PT) thin films with Lotgering factors of 0.98–1.0, without an orienting perovskite seed layer, is presented. Deposition of a 2–3‐nm‐thick PbO buffer layer on {111} Pt thin film bottom electrodes, prior to chemical solution deposition of PMN‐PT reduces the driving force for Pb diffusion from the PMN‐PT to the bottom electrode, and facilitates nucleation of {001}‐oriented perovskite grains. Energy dispersive spectroscopy demonstrated that up to 10% of the Pb from a PMN‐PT precursor solution may diffuse into the bottom electrode. PMN‐PT grains with a mixed {101}/{111} orientation in a matrix of Pb‐deficient pyrochlore phase were then promoted near the interface. When this is prevented, phase‐pure films with {001} orientation can be achieved.