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Sol-gel Synthesis of LaAlO3; Epitaxial Growth of LaAlO3 Thin Films on SrTiO3(100)

Published online by Cambridge University Press:  31 January 2011

Shara S. Shoup ,
Mariappan Paranthaman ,
David B. Beach ,
E. D. Specht  and
Robert K. Williams
Shara S. Shoup
Affiliation:
Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831–6100
Mariappan Paranthaman
Affiliation:
Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831–6100
David B. Beach
Affiliation:
Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831–6100
E. D. Specht
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831–6118
Robert K. Williams
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831–6118
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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 φ scan of the (202) plane with FWHM = 1.07°.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 4 , April 1997 , pp. 1017 - 1021
Copyright
Copyright © Materials Research Society 1997

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