Relationships between Electronic Structure and Stability of Metallic Glasses
Abstract
This year has been dedicated to thorough investigations of the electronic properties of amorphous metallic Ag-Ge alloys. These alloys are similar to the Au-Ge alloys studied previously, but in Ag the d-band is located at lower energies with respect to the Fermi level than in Au. The hybridization between the Ge s,p-states and the noble metal d-state may therefore occur differently; moreover, this extends the energy range over which the free- electron behavior of the optical properties can be studied. Amorphous metallic Ag-Ge alloys have been obtained by co-evaporation onto cold substrates for Ge concentrations ranging from 20 to 40 at. %. We have controlled their stability as a function of temperature and we have followed the crystallization processes by in-situ resistance measurements. We have determined their transport properties and we have analyzed their optical properties according to the free-electron Drude model. We discuss the variation of the conduction electron parameters with composition and we compare the results with those already obtained for the Au-Ge alloys.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1982
- Accession Number
- ADA217194
Entities
People
- F. Abeles
- M. L. Theye
- V. Nguyen Van
Organizations
- Pierre and Marie Curie University