1. A. Katz, C.R. Abernathy and S.J. Pearton, Appl. Phys. Lett. 56, 1028 (1990).
2. K.M. Schmitz, K.L. Jiao, R. Sharma, W.A. Anderson, G. Rajeswaran, L.R. Zheng, M.W. Cole and R.T. Lareau, J. Mater. Res. 6, 553 (1991).
3. Comprehensive Co-ordination Chemistry, ed. G. Wilkinson (Oxford: Pergamon, 1987), Vol. 3, p. 279.
4. Binary Alloy Phase Diagrams, ed. T.B. Massalski (Metals Park, OH: American Society for Metals, 1987).
5. J.L. Tandon, K.D. Doudlas, G. Vendura, E. Kolawa, F.C.T. So and M.-A. Nicolet, Proc. 1 Workshop on Tungsten and Other Refractory Metals for VLSI Applications, ed. R.S. Blewer (Pittsburgh, PA: Materials Research Society, 1986).