Systematics in the electronic structure of amorphous transition metal/tin alloys

✍ Scribed by H.-G. Boyen; G. Indlekofer; P. Oelhafen; P. Häussler; F. Baumann; V.L. Moruzzi

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 317 KB
• Volume: 133
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/0921-5093(91)90025-i

✦ Synopsis

Photoemission measurements were performed on in-situ prepared amorphous TMxSnl00_ ~ films (TM = Fe, Co, Ni, Pd). Valence band spectroscopy and core level analysis are in contradiction to the charge transfer model, often used to explain the magnetism and binding of transition metal/metalloid alloys. A comparison of valence-band spectra with theoretical density of states (DOS) curves indicates the existence of topological and chemical short-range order. Band structure calculations explain the stability of these alloys as being due to a hybridization pseudo-gap at the Fermi energy. A similar pseudo-gap is also expected within a nearly-free-electron model.