Abstract
Thin films of MnTe were grown by molecular beam epitaxy on CdTe(l 10). Angle resolved synchrotron radiation photoemission spectroscopy shows that MnTe grows initially in the metastable zinc blende structure In registry with the substrate. After a film thickness of 4̃0 Å the overlayer relaxes Into the thermodynamically stable hexagonal NiAs structure. Above 1̃00 C the MnTe/CdTe heterostructure is thermally unstable. At −250 C the MnTe film reacts with the substrate and forms an epitaxial overlayer of MnCdTe 2. Comparison of the valence band photoemission spectra with calculated density of states suggests the formation of a ferromagnetic ordered MnCdTe 2 compound rather then the thermodynamlcally more favorable phase separation into antiferromagnetic MnTe 2 and zinc-blende CdTe.
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