Dysprosium methyl- and propylacetamidinates {[RNC(Me)NR]2Dy}2[μ-η2-η2-RNC(Me)NR]2 ( R = Me, n-Pr) were synthesized and structurally characterized. Their volatility,
catalytic activity and luminescent properties were studied. Due to volatility, dysprosium amidinate complexes can be potentially applied as precursors for the MOCVD or ALD growth of Dy-containing thin films.[i]
[i] M.N. Bochkarev, A.A. Maleev, T.V. Balashova, G.K. Fukin, E.V. Baranov, Y.A. Efimova, B.I. Petrov, V.A. Ilichev, Inorg. Chim. Acta, 2008, Vol.361, Iss.8, p.2533–2539, « Methyl- and propylacetamidinates of lanthanides: Structures, catalytic and some physical properties »
Dysprosium tris(diisopropylacetamidinate) Dy((iPr2N)2-CMe)3 was applied either as single source precursor, or with NH3 as co-reactant for growth of DyN layers by MOCVD. The
thermal properties of Dy((iPr2N)2-CMe)3 precursors were studied and high-resolution electron impact−mass spectrometry (HR EI-MS) was used for the investigation of fragmentation patterns. The obtained DyN
films were characterized XRD, SEM, nuclear reaction analysis (NRA), RBS and XPS; according to the measurements, the grown dysprosium nitride layers layer contained preferentially oriented grains of fcc-DyN and were contaminated with C and O (<<10 at. %
in the best cases). Presence of small ferromagnetic grains of DyN that exhibited superparamagnetism was obcerved by the measurement of temperature-dependent magnetic properties of the layers using SQUID devices. It was determeine that amidinates were not suitable as single source precursors, but produced very good DyN layers in the presence of NH3 as co-reactant.[i]
[i] T.B. Thiede, M. Krasnopolski, A.P. Milanov, T. de los Arcos, A. Ney, H.-W. Becker, D. Rogalla, J. Winter, A. Devi, R.A. Fischer, Chem. Mater., 2011, 23 (6), pp 1430–1440, DOI: 10.1021/cm102840v , « Evaluation of Homoleptic Guanidinate and Amidinate Complexes of Gadolinium and Dysprosium for MOCVD of Rare-Earth Nitride Thin Films »