Crystallization Atmosphere and Substrate Effects on the Phase and Texture of Chemical Solution Deposited Strontium Niobate Thin Films. Issue 3 (12th February 2013)

• Record Type: Journal Article
• Authors: Campion, Michael J.; Brown‐Shaklee, Harlan J.; Rodriguez, Mark A.; Richardson, Jacob J.; Clem, Paul G.; Ihlefeld, Jon F.; Trolier‐McKinstry, S.
• Is Part Of: Journal of the American Ceramic Society. Volume 96:Issue 3(2013)
• Page Start: 743
• Page End: 749
• Publication Date: 2013-02-12
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.12193
• Languages: English
• ISSNs: 0002-7820

Abstract

<abstract abstract-type="main" xml:lang="en" id="jace12193-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Strontium niobate (Sr:Nb <bold>=</bold> 1:1) thin films were prepared via chemical solution deposition on (001)‐oriented SrTiO<sub>3</sub>, (001)<sub><italic>p</italic></sub>‐oriented LaAlO<sub>3</sub>, (0001)‐oriented sapphire, and polycrystalline alumina substrates. Crystallization in oxygen at 1000°C yielded Sr<sub>2</sub>Nb<sub>2</sub>O<sub>7</sub> films on all substrates with strong (010) orientation. Films on LaAlO<sub>3</sub> and SrTiO<sub>3</sub> single‐crystal substrates possessed a small amount of preferred in‐plane orientation, whereas films prepared on sapphire and polycrystalline alumina substrates were fiber textured. Films crystallized at 900°C in a low oxygen atmosphere (~10<sup><bold>−</bold>21</sup> atm <italic>p</italic>O<sub>2</sub>) formed a randomly oriented polycrystalline perovskite, SrNbO<sub>3−δ</sub> on all substrates. A similar set of films crystallized at 900°C at a slightly higher oxygen partial pressure (~10<sup>−15</sup> atm <italic>p</italic>O<sub>2</sub>) was comprised of Sr<sub>2</sub>Nb<sub>2</sub>O<sub>7</sub> and SrNbO<sub>3−δ</sub> phases, exposing the dependence of phase formation on oxygen partial pressure. When subjected to a high‐temperature anneal in oxygen, the SrNbO<sub>3−δ</sub> phase is shown to transform into Sr<sub>2</sub>Nb<sub>2</sub>O<sub>7</sub>, however, Sr<sub>2</sub>Nb<sub>2</sub>O<sub>7</sub> did not significantly reverse transform into SrNbO<sub>3−δ</sub> after annealing in low oxygen partial pressure atmospheres.</p> </abstract>