Sol-gel synthesis of LaAlO3; Epitaxial growth of LaAlO3 thin films on SrTiO3 (100)

Shara S. Shoup; Mariappan Paranthaman; David B. Beach; E. D. Specht; Robert K. Williams

doi:10.1557/JMR.1997.0142

Sol-gel synthesis of LaAlO₃; Epitaxial growth of LaAlO₃ thin films on SrTiO₃ (100)

Shara S. Shoup, Mariappan Paranthaman, David B. Beach, E. D. Specht, Robert K. Williams

Nanomaterials Chemistry Group

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

Abstract

A LaAlO₃ precursor solution was prepared via an all alkoxide sol-gel route. The solution of lanthanum methoxyethoxide and aluminum methoxyethoxide in 2-methoxyethanol was prepared via ligand exchange starting from lanthanum isopropoxide and aluminum sec-butoxide and was used to make both LaAlO₃ powders and films. Complete hydrolysis of the solution formed a gel that yielded well-crystallized LaAlO₃ powders when fired in air at 800 °C. A partially hydrolyzed solution was spun-cast on SrTiO₃ (100) single crystal substrates. Epitaxial films of LaAlO₃ were subsequently formed during pyrolysis in O₂ at 800 °C in a rapid thermal annealing furnace for a total of 8 min. The films were strongly c-axis oriented, verified by x-ray rocking curve results from the (003) plane with full-width at half-maximum (FWHM) = 0.87°, and had good in-plane texture shown by a Φscan of the (202) plane with FWHM = 1.07°.

Original language	English
Pages (from-to)	1017-1021
Number of pages	5
Journal	Journal of Materials Research
Volume	12
Issue number	4
DOIs	https://doi.org/10.1557/JMR.1997.0142
State	Published - Apr 1997

Funding

This research was sponsored by the United States Department of Energy, Division of Materials Sciences, Office of Basic Energy Sciences and Office of Energy Efficiency and Renewable Energy, Office of Utility Technology-Superconductivity program, performed at the Oak Ridge National Laboratory (ORNL) managed by Lockheed Martin Energy Research Corporation under Contract No. DE-AC05-96OR22464. One of us (S.S.S.) acknowledges support by an appointment to the ORNL Postdoctoral Research Associates Program administered jointly by ORNL and by the Oak Ridge Institute for Science and Education.

Funders	Funder number
Office of Basic Energy Sciences
Office of Utility Technology-Superconductivity Program
United States Department of Energy
Lockheed Martin Corporation
Office of Energy Efficiency and Renewable Energy
Oak Ridge National Laboratory
Oak Ridge Institute for Science and Education
Division of Materials Sciences and Engineering

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title = "Sol-gel synthesis of LaAlO3; Epitaxial growth of LaAlO3 thin films on SrTiO3 (100)",

abstract = "A LaAlO3 precursor solution was prepared via an all alkoxide sol-gel route. The solution of lanthanum methoxyethoxide and aluminum methoxyethoxide in 2-methoxyethanol was prepared via ligand exchange starting from lanthanum isopropoxide and aluminum sec-butoxide and was used to make both LaAlO3 powders and films. Complete hydrolysis of the solution formed a gel that yielded well-crystallized LaAlO3 powders when fired in air at 800 °C. A partially hydrolyzed solution was spun-cast on SrTiO3 (100) single crystal substrates. Epitaxial films of LaAlO3 were subsequently formed during pyrolysis in O2 at 800 °C in a rapid thermal annealing furnace for a total of 8 min. The films were strongly c-axis oriented, verified by x-ray rocking curve results from the (003) plane with full-width at half-maximum (FWHM) = 0.87°, and had good in-plane texture shown by a Φscan of the (202) plane with FWHM = 1.07°.",

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AU - Paranthaman, Mariappan

AU - Beach, David B.

AU - Specht, E. D.

AU - Williams, Robert K.

PY - 1997/4

Y1 - 1997/4

N2 - A LaAlO3 precursor solution was prepared via an all alkoxide sol-gel route. The solution of lanthanum methoxyethoxide and aluminum methoxyethoxide in 2-methoxyethanol was prepared via ligand exchange starting from lanthanum isopropoxide and aluminum sec-butoxide and was used to make both LaAlO3 powders and films. Complete hydrolysis of the solution formed a gel that yielded well-crystallized LaAlO3 powders when fired in air at 800 °C. A partially hydrolyzed solution was spun-cast on SrTiO3 (100) single crystal substrates. Epitaxial films of LaAlO3 were subsequently formed during pyrolysis in O2 at 800 °C in a rapid thermal annealing furnace for a total of 8 min. The films were strongly c-axis oriented, verified by x-ray rocking curve results from the (003) plane with full-width at half-maximum (FWHM) = 0.87°, and had good in-plane texture shown by a Φscan of the (202) plane with FWHM = 1.07°.

AB - A LaAlO3 precursor solution was prepared via an all alkoxide sol-gel route. The solution of lanthanum methoxyethoxide and aluminum methoxyethoxide in 2-methoxyethanol was prepared via ligand exchange starting from lanthanum isopropoxide and aluminum sec-butoxide and was used to make both LaAlO3 powders and films. Complete hydrolysis of the solution formed a gel that yielded well-crystallized LaAlO3 powders when fired in air at 800 °C. A partially hydrolyzed solution was spun-cast on SrTiO3 (100) single crystal substrates. Epitaxial films of LaAlO3 were subsequently formed during pyrolysis in O2 at 800 °C in a rapid thermal annealing furnace for a total of 8 min. The films were strongly c-axis oriented, verified by x-ray rocking curve results from the (003) plane with full-width at half-maximum (FWHM) = 0.87°, and had good in-plane texture shown by a Φscan of the (202) plane with FWHM = 1.07°.

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Sol-gel synthesis of LaAlO₃; Epitaxial growth of LaAlO₃ thin films on SrTiO₃ (100)

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