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Volatile Mixed Metal Y-Ba and Ba-Cu Precursors for Mocvd of HighTc Superconductors: A Way to Improve the Transport of Barium?

Published online by Cambridge University Press:  21 February 2011

Liliane G. Hubert-Pfalzgraf ,
Florence Labrize ,
Herve Guillon  and
Patrick Tobaly
Liliane G. Hubert-Pfalzgraf
Affiliation:
Université de Nice Sophia-Antipolis, 06108 NICE Cedex, France
Florence Labrize
Affiliation:
Université de Nice Sophia-Antipolis, 06108 NICE Cedex, France
Herve Guillon
Affiliation:
Université de Nice Sophia-Antipolis, 06108 NICE Cedex, France
Patrick Tobaly
Affiliation:
Lab. d'Ingénierie des Matériaux, 93430 Villetaneuse, France
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Abstract

The fluoroisopropoxide ligand (HFIP) has allowed the synthesis ofmixed-metal homoleptic Ba2Y and CuBa alkoxides. However, althoughthese species are all volatile, their poor thermal stability precludes theiruse as CVD precursors. Their properties have thus been optimized byintroduction of 2,2,6,6-tetramethylheptane-3,5-dione (thdH) in the metalcoordination sphere. Compounds such as Y2Ba(μ-HFIP)4(thd)4, the first volatileY-Ba species reported so far, as well as BaCu2(HFIP)4(thd)2 and YCu(HFIP)2(thd)3 have been obtained. Theseheterometallic ϐdiketonatoalkoxides have been characterized by a variety oftechniques including X-ray diffraction, mass spectrometry, vapor pressuremeasurements and thermogravimetric analysis. Preliminary data on thermaldecomposition experiments are given.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 346: Symposium N – Better Ceramics Through Chemistry VI , 1994 , 279
Copyright
Copyright © Materials Research Society 1998

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References

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