Publication

Combinatorial Chemical Beam Epitaxy of Lithium Niobate Thin Films on Sapphire

Paul Muralt
2011
Journal Articles

Abstract

A combinatorial chemical beam epitaxy technique was used to optimize deposition of (001) lithium niobate thin films on {001} sapphire substrates. Lithium tert-butoxide [Li(OBut)] and niobium tetra-ethoxy di-methyl-amino-ethoxide [Nb(OEt)(4)(dmac)] were used as precursors. The highest quality films obtained exhibited rocking curve full-width at half-maximum values of about 0.03 degrees and lithium contents {[Li]/[(Li)) + (Nb)]} larger than 48 (mol %) estimated by Raman spectroscopy. High-resolution transmission electron microscopy observations revealed that the lithium niobate film consists of a buffer layer (thickness

Official source

https://infoscience.epfl.ch/entities/publication/c9d9e66b-aba3-4b3b-9cee-09902146ef8f

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Paul Muralt
2011
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/c9d9e66b-aba3-4b3b-9cee-09902146ef8f

About this result

Related concepts (9)

Niobium

Niobium is a chemical element with chemical symbol Nb (formerly columbium, Cb) and atomic number 41. It is a light grey, crystalline, and ductile transition metal. Pure niobium has a Mohs hardness rating similar to pure titanium, and it has similar ductility to iron. Niobium oxidizes in Earth's atmosphere very slowly, hence its application in jewelry as a hypoallergenic alternative to nickel. Niobium is often found in the minerals pyrochlore and columbite, hence the former name "columbium".

Perovskite (structure)

A perovskite is any material with a crystal structure following the formula ABX3, which was first discovered as the mineral called perovskite, which consists of calcium titanium oxide (CaTiO3). The mineral was first discovered in the Ural mountains of Russia by Gustav Rose in 1839 and named after Russian mineralogist L. A. Perovski (1792–1856). 'A' and 'B' are two positively charged ions (i.e. cations), often of very different sizes, and X is a negatively charged ion (an anion, frequently oxide) that bonds to both cations.

Piezoelectricity

Piezoelectricity (ˌpiːzoʊ-,_ˌpiːtsoʊ-,_paɪˌiːzoʊ-, piˌeɪzoʊ-,_piˌeɪtsoʊ-) is the electric charge that accumulates in certain solid materials—such as crystals, certain ceramics, and biological matter such as bone, DNA, and various proteins—in response to applied mechanical stress. The word piezoelectricity means electricity resulting from pressure and latent heat. It is derived (an ancient source of electric current). The piezoelectric effect results from the linear electromechanical interaction between the mechanical and electrical states in crystalline materials with no inversion symmetry.