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Volatile Mixed Metal Y-Ba and Ba-Cu Precursors for Mocvd of High Tc 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 of mixed-metal homoleptic Ba2Y and CuBa alkoxides. However, although these species are all volatile, their poor thermal stability precludes their use as CVD precursors. Their properties have thus been optimized by introduction of 2,2,6,6-tetramethylheptane-3,5-dione (thdH) in the metal coordination sphere. Compounds such as Y2Ba(μ-HFIP)4(thd)4, the first volatile Y-Ba species reported so far, as well as BaCu2(HFIP)4(thd)2 and YCu(HFIP)2(thd)3 have been obtained. These heterometallic ϐdiketonatoalkoxides have been characterized by a variety of techniques including X-ray diffraction, mass spectrometry, vapor pressure measurements and thermogravimetric analysis. Preliminary data on thermal decomposition experiments are given.

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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